- extra status line

- CommandMargin.StatusLine -> StatusInCommandLine
-"statusline" and "laststatus" added

- Dependency Property IsStatusLineVisible
update status line
-Update status line on tab change
- reformat
Fix after rebase
Fix after rebase
- Fixes for  broken unit tests
Merge pull request #1361 from idealist1508/fix1350

Fix for: Basic support for :set statusline #1350