Improves work package attribute interface hook
Sketch activity icon labels
Add event types and names to activity providers (#2250)
Add activity labels to activities#index and users#show
Add icon labels to search#index
Add change log entry (#2250)
Sketch activity icon labels
Add event types and names to activity providers (#2250)
Add change log entry (#2250)
Update icon font css rules (#2250)
Add view hook to users show... (#2250)

... to enable plugins to add their own activity icons
Add view hook to search#index (#2250)
Adds localizations
Introduces an image with an alternate text
Re-implements group toggle in jQuery
Hides expand/collapse all button for text reader
Adds changelog entry
Uses icon font instead of expand/collapse image
Removes superfluous locales
Merge pull request #819 from opf/fix/accessibility_alt_text_collapse_expand_on_grouped_work_package_list

[FIX] Accessibility alt text collapse expand on grouped work package list