Replace image by icon font
removed !important from

backlog version toggler CSS
Merge pull request #97 from finnlabs/feature/8413_collapse_expand_arrow_not_displayed

[Fix] 8413 Collapse/Expand arrow not displayed
Merge branch 'release/3-0-5' into release/3.0.7
New version; updated changelog
Merge branch 'release/3.0.7' into stable
Update core dep