Index: lams_central/web/css/main.css
===================================================================
diff -u -r8d104e54ae65a9dfc2915954cd4e6461c173e799 -r97deffe165055d02a9942930ec547b5ee040dc42
--- lams_central/web/css/main.css	(.../main.css)	(revision 8d104e54ae65a9dfc2915954cd4e6461c173e799)
+++ lams_central/web/css/main.css	(.../main.css)	(revision 97deffe165055d02a9942930ec547b5ee040dc42)
@@ -307,6 +307,9 @@
 	vertical-align: middle;
 	border-radius: 10px;
 }
+#notificationsPendingCount.btn-default {
+    background-color: #ddd;
+}
 
 /*DIALOGS*/
 .dialogContainer {
Index: lams_central/web/includes/javascript/addLesson.js
===================================================================
diff -u -r7f5de60cba2fa6ed056786c5461af6e29518723f -r97deffe165055d02a9942930ec547b5ee040dc42
--- lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision 7f5de60cba2fa6ed056786c5461af6e29518723f)
+++ lams_central/web/includes/javascript/addLesson.js	(.../addLesson.js)	(revision 97deffe165055d02a9942930ec547b5ee040dc42)
@@ -1,4 +1,4 @@
-// ********** MAIN FUNCTIONS **********
+// ********** MAIN FUNCTIONS **********
 var tree,
 	lastSelectedUsers = {},
 	sortOrderAscending = {},
@@ -7,7 +7,6 @@
 	originalThumbnailWidth = 0,
 	originalThumbnailHeight = 0;
 
-
 /**
  * For tabs changing.
  */
@@ -50,13 +49,17 @@
 	});
 	
 	tree.singleNodeHighlight = true;
-	tree.subscribe('clickEvent', function(event){
-		if (!event.node.data.learningDesignId){
-			// it is a folder
+	tree.subscribe('clickEvent', function(event) {
+		// if it's a folder - do not select it. if design is already selected - do not allow deselecting it on subsequent click
+		if (!event.node.data.learningDesignId || event.node.highlightState == 1) {
 			return false;
 		}
 		
 		$('#lessonNameInput').val(event.node.label);
+		//focus element only if it's visible in the current viewport (to avoid unwanted scrolling)
+		if (isElementInViewport($('#lessonNameInput'))) {
+			$('#lessonNameInput').focus();
+		}
 		
 		// display "loading" animation and finally LD thumbnail
 		$('.ldChoiceDependentCanvasElement').css('display', 'none');
@@ -67,13 +70,46 @@
 		}
 	});
 	tree.subscribe('clickEvent',tree.onEventToggleHighlight);
+	tree.subscribe('dblClickEvent', function(event){
+		
+		// if it's a folder - do not select it
+		if (!event.node.data.learningDesignId) {
+			return false;
+		}
+		
+		//trigger "clickEvent" first so that addLesson() function will know which element is selected 
+		tree.fireEvent("clickEvent", event);
+		
+		// start lesson
+		addLesson();
+	});
 	tree.render();
 	
 	// expand the first (user) folder
 	tree.getRoot().children[0].expand();
+	
+	// ability to start a lesson on pressing Enter button in a lesson name input
+	$('#lessonNameInput').on('keyup', function (e) {
+	    if (e.keyCode == 13) {
+	    	 addLesson();
+	    }
+	});
 }
 
+//checks whether element is visible in the current viewport
+function isElementInViewport(el) {
+	el = el[0];
+    var rect = el.getBoundingClientRect();
 
+    return (
+        rect.top >= 0 &&
+        rect.left >= 0 &&
+        rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && /*or $(window).height() */
+        rect.right <= (window.innerWidth || document.documentElement.clientWidth) /*or $(window).width() */
+    );
+}
+
+
 function initClassTab(){
 	// users variable is declared in newLesson.jsp
 	fillUserContainer(users.selectedLearners, 'selected-learners');
Index: lams_central/web/includes/javascript/main.js
===================================================================
diff -u -r15a0a16d66153b4f57df055b38b2c3143445b5fa -r97deffe165055d02a9942930ec547b5ee040dc42
--- lams_central/web/includes/javascript/main.js	(.../main.js)	(revision 15a0a16d66153b4f57df055b38b2c3143445b5fa)
+++ lams_central/web/includes/javascript/main.js	(.../main.js)	(revision 97deffe165055d02a9942930ec547b5ee040dc42)
@@ -446,6 +446,13 @@
 		},
 		success : function(count) {
 			$('#notificationsPendingCount').text(count == 0 ? '0' : count);
+			
+			//#notificationsPendingCount will have .btn-primary class when there are some messages available and .btn-default otherwise
+			if (count == 0) {
+				$('#notificationsPendingCount').removeClass("btn-primary").addClass("btn-default");
+			} else {
+				$('#notificationsPendingCount').removeClass("btn-default").addClass("btn-primary");
+			}
 		}
 	});
 }
Index: lams_central/web/less/main.less
===================================================================
diff -u -r4ebcb20e42c6296480b52fe6986a7da08442ebf3 -r97deffe165055d02a9942930ec547b5ee040dc42
--- lams_central/web/less/main.less	(.../main.less)	(revision 4ebcb20e42c6296480b52fe6986a7da08442ebf3)
+++ lams_central/web/less/main.less	(.../main.less)	(revision 97deffe165055d02a9942930ec547b5ee040dc42)
@@ -351,6 +351,9 @@
 	vertical-align: middle;
 	border-radius: 10px;
 }
+#notificationsPendingCount.btn-default {
+    background-color: #ddd;
+}
 
 /*DIALOGS*/
 .dialogContainer {
Index: lams_central/web/main.jsp
===================================================================
diff -u -rda3c4373fcf7b9dac02ab988aba796a16933521e -r97deffe165055d02a9942930ec547b5ee040dc42
--- lams_central/web/main.jsp	(.../main.jsp)	(revision da3c4373fcf7b9dac02ab988aba796a16933521e)
+++ lams_central/web/main.jsp	(.../main.jsp)	(revision 97deffe165055d02a9942930ec547b5ee040dc42)
@@ -275,14 +275,14 @@
 					<li role="presentation" class="dropdown">   
 						<a href="javascript:;" onclick="javascript:showPrivateNotificationsDialog();" class="dropdown-toggle info-number tour-user-notifications" data-toggle="dropdown" aria-expanded="false">
 							<i class="fa fa-envelope-o"></i>
-                    		<span id="notificationsPendingCount" class="btn-primary"></span>
+                    		<span id="notificationsPendingCount" class="btn-default"></span>
 						</a>
 					</li>
 					
 					<li role="presentation" class="dropdown">       
 						<a href="javascript:;" onclick="javascript:startTour();" class="dropdown-toggle info-number" data-toggle="dropdown" aria-expanded="false">
-							<span class="xs-hidden"><fmt:message key="label.tour"/></span>
 							<i class="fa fa-question-circle"></i>
+							<span class="xs-hidden"><fmt:message key="label.tour"/></span>
 						</a>
 					</li>