Fix layout issues with toolbars

Change-Id: I40ea3da09c8619f11a7ec481d0c155df3dcd4456
Minor: Code cleanup

Change-Id: If509055978f572e6c2d0fdb6d5f23305b0295150
Merge debugging actions into other toolbar

This way we can have all actions inside one tool bar and don't require
hacking the style of ToolBar to support multiple instances side-by-side.

Also introduce ToolBarSeparator, a horizontal/vertical line for
separating the individual tool buttons.

Change-Id: I7f42e6cb787fe56e973d795265a861951212e9da