Update to 3.5 and add comments to patches.

Update to 3.5 and add comments to patches.

3.5.0:
  * New alt-tab dialog shows windows in a vertical list.
  * Improved Xinerama support.
  * Allow icons in menus.
  * Theme options for prompt dialogs (osd.button.unpressed.*,
    osd.button.pressed.*, osd.button.focused.*)
  * Addresses bug #4877, #4596, #4617, #4752, #4663, #4662, #4586, #2319,
    #4341, #4519, #4543, #4503, #4355, #4072, #3702, #4284
  * Lots of additional bug fixes and performance improvements.