Replace search field magnifier icon
Replace collapsible icon by icon-font
Add changelog entry
Merge pull request #1305 from opf/fix/7623_replace_remaining_icons_by_icon_font

[Fix] 7623 replace remaining icons by icon font
Add specs for Redmine::UnifiedDiff
Fix double escaping in Redmine::UnifiedDiff
Add styles for repository diff
Merge pull request #1321 from netfighter/bugfix/7234_highlighting_differences_in_repo