Added tab wrappers
Better looking user list
Fixed top margin in post upload
Vertical scrollbar is shown everywhere

Reason: navigating between pages w/o scrollbar and pages with scrollbar
resulted in slight layout repositioning
Changed footer appearance
Changed tabs appearance
Layout resizing tweaks
Dates changed to relative form (except logs)
Upload no longer uses tabs
Removed borders for sidebar units
Form CSS overhaul
Fixed useless arguments
Searching: more robust entity counting
Added pagination to tag list
GUI colors are consistent
Fixed exit confirmation message on Chrome
Freshened up sidebar
Post editing: quasi-popup in place of sliding unit
Fixed saving post original file name to DB
Fixed extension in saved posts