fixes #1094 now getting the list of corpus from teh user's roles on teh database instead of the user. this is more robust and doesnt require any extra work on the users part to find out that they have new corpora. and fixes #676 added a list of corpora in the corpus dropdown where it will be easier to find.
making the activity feeds have no horizontal scroll bar for the windows users, and reanaming their titles to something more informative and why they woudl use them ie to know what htey were doing last time, adn to find out what else is going on in teh corpus. increased the default size to 50 activities. reversed the order of the feeds to put the corpus one on top.
making the comments area below the old comments
for #1111 enteredByUser and modified by user werent searchable in advanced search, now they are
fixes #376 made the comments insert in chronological order and made the new comment area smaller and less distracting. untimately we should make it very easy to add comments to datum (right now its 1 click) if we hide the comments area, it would be two clicks, and if we hide the comments area, and the new comment box, it would be three clicks. if there are too many comments on the datum we could make a setting to hide comments if there aremore than 3?