re #840 remove theme support, please use x_backlogs_styleadapter plugin
use 12px for jquery widget font
correct font-family for tooltips
Added show category feature for backlogs view
moved helper function for colorization of categories in backlog
minor fixes to category display
finetuning for color generation of category badges
Merge branch 'category_feature' of github.com:clueda/redmine_backlogs into category_feature