VE-518 Allow Category namespace for VisualEditor
VE-1206 Add Category to valid VisualEditor namespaces
Add namespace in Wikia code only
Undo previous change
VE-1207: Focus mode adjustments for Category namespace
Separate additional namespaces from blog namespace logic
Merge pull request #3891 from Wikia/VE-1206

VE-1206 Add Category to valid VisualEditor namespaces
VE-1207: Code review feedback
VE-1207: More code review
Merge pull request #3896 from Wikia/VE-1207-new

VE-1207: Focus mode adjustments for Category namespace
VE-518: Insert content properly when saving
VE-518: Code review
VE-518: Code review feedback
VE-518: Code review feedback
Merge pull request #3899 from Wikia/fix-category-save

VE-518: Insert content properly when saving
Merge branch 've-sprint-20' into VE-518

Conflicts:
	extensions/VisualEditor/wikia/VisualEditor.php
VE-518: Travis feedback
Merge pull request #3908 from Wikia/VE-518

VE-518