fixes from todays test session: learner progress to scroll to current act when initially loaded + fix double var use in learner tab and container depths
LDEV-1165: Wasn't able to disable the character limit for non rich text editing in forum. Changed authoring to check the limit on/off flag before checking number of characters > 0, and at learner if the limit is off then sets num chars to 0, which the jsp interprets as "no check".
LDEV-1225: Page wasn't working if the learner had started the activity but hadn't saved their entry. Now if there isn't an entry, it shows the normal page but skips the entry section.