At least horizontal works in Spark
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