LDEV-5397 Improve offcanvas progress bar + various other fixes as mentioned in the JIRA's comment
* Improved offcanvas progress bar:
icon for not completed activity should a hollow square, not a full one;
gate icons: hourglass icons replaced with locks;
support for long activity names;
tooltips on icon hover explaining what it means, for example “current activity”;
improved CSS
* Teams table should have maximum width and/or highlight on hover
* “Burning questions” button should have standard size (not small) and have the same primary colour as “Justification” button
* In burning questions summary the title does not have sufficient contrast
* In Chat the font should have standard and not reduced size
* In Daco there is an empty alert
* In Task List (and Share Resources) button to complete an item should say something like “Mark as completed” or “Complete” instead of “Completed”
* Admin pages: restored background colour to ghostly white
