VE-555: add inspector tracking.
Merge branch 've-sprint-6' into VE-555
VE-555: differentiate between clicks on tools in the surface and tools in the target toolbar.
VE-555: add TODO note for later.
VE-555: track to internal and GA.
VE-555: add wikitext warning modal tracking.
VE-555: add source mode dialog tracking.
VE-555: add open count to source dialog.
Merge pull request #2013 from Wikia/VE-555

VE-555: miscellaneous editor tracking