First version of NewUI main menu
At least horizontal works in Spark
Second attemps at enabled->disabled
Merge pull request #2083 from ussuri/enabled-disabled-for-spark-button

Second attempt at enabled -> disabled - needed for new UI widgets
Merge remote-tracking branch 'upstream/master' into new-ui-toolbar
Added [justify] attribute + replaced [directio] with [horizontal] + [vertical]
Added [debug] attribute in addition to .debug class for debugging widgets
Merge pull request #2084 from ussuri/small-fixes-2

Added [debug] attribute in addition to .debug class for debugging widgets
Remove dubugging leftovers
Merge pull request #2085 from ussuri/new-ui-toolbar

[New UI] spark-toolbar
Removed debugging leftovers
Merge pull request #2086 from ussuri/new-ui-toolbar

Removed debugging leftovers
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
Tiny change to aid debugging of widgets
Merge pull request #2088 from ussuri/small-fixes-2

Tiny change to aid debugging of widgets
Changed menu color
New Dartium: fix editor panel resizing randomly when switching between files
Merge pull request #2089 from ussuri/patch-new-dartium-problems

New Dartium: fix editor panel resizing randomly when switching between files
Merge pull request #2087 from ussuri/new-ui-main-menu

[New UI] Main menu