Fixed a couple bugs in BlenderFileBrowser

Navigating the tree with the keyboard wouldn't update the info section;
Value link was enabled by default and would crash the program if clicked
on.
Updated BlenderFileBrowser with text filtering

Also added a few XML comments that were missing before to the corelib;
added generated XML to /dist, as well as updated /dist. Updated
BlenderFileBrowser's comment parser to allow comments, added a couple
lines to comments.txt to test it.