Fix invariant violation
Revert default category if it is deleted
Fix redraw issue
Merge pull request #329 from krazemon/violation

Fix invariant violation
Merge pull request #330 from krazemon/default-category

Revert default category if it is deleted
Merge pull request #332 from krazemon/redraw

Fix redraw issue
Merge branch 'master' of https://github.com/krazemon/reps into cdn
Fix typo