[issue-288] Return false instead of event manipulation
[issue-288] Inject CSS tweak
Revert "[issue-288] Inject CSS tweak"

This reverts commit 80e038d62fad38ef50ae86ea24f94001ec5810c4.
[issue-288] Move tweak to external CSS file
Merge branch 'develop' into issue-288
Merge branch 'master' into issue-288
Merge pull request #297 from x-team/issue-288

Issue 288: Minor glitch in UI when switching between Settings tabs