Enable run spark in spark.
Add progress component to Git push dialog.
Update git push dialog with progress.
First version of NewUI main menu
Multiple improvements, but not 100% NewUI yet
Merge remote-tracking branch 'upstream/master' into new-ui-button

Conflicts:
	widgets/lib/spark_button/spark_button.css
Delete spark-icon-button - spark-button will be able to do the same thing
Merge remote-tracking branch 'upstream/master' into new-ui-button
Update button names.
Delete spark-icon-button test
Merge branch 'master' into git_push_dialog
Merge remote-tracking branch 'upstream/master' into new-ui-button

Conflicts:
	widgets/lib/spark_button/spark_button.css
Remove cached reference of project in scmManager.
Merge remote-tracking branch 'upstream/master' into new-ui-button
Minimize the button test for now
Globally turn off outline for widgets and widget's contents
Merge remote-tracking branch 'upstream/master' into new-ui-main-menu

Conflicts:
	widgets/lib/spark_menu/spark_menu.css
	widgets/lib/spark_menu_button/spark_menu_button.css
	widgets/lib/spark_menu_item/spark_menu_item.css
Minor adjustments
Remove spark-icon-button from top-level examples.dart
Workaround to ensure propagation of changes from spark-menu-button to spark-button