Update admin.less

https://github.com/ReduxFramework/redux-framework/pull/1668#issuecomment-55355195
Fix the cog icon dispalyed if not set in args; Fixes #1653
Some little docblock for admin bar title var; Fixes #1653
Seperating different sections...
Merge pull request #1679 from shivapoudel/patch-1

Seperating different sections...
Merge pull request #1676 from axisthemes/addition

Addition to Admin Bar
Merge pull request #1673 from wpexplorer/patch-4

Update admin.less