We're getting rid of meta item grouping, so we need to prepare.
Merged:
* ve.dm.MWIndexMetaItem
from ve.dm.MWIndexDisableMetaItem and ve.dm.MWIndexForceMetaItem
* ve.dm.MWNewSectionEditMetaItem
from ve.dm.MWNewSectionEditDisableMetaItem and ve.dm.MWNewSectionEditForceMetaItem
* ve.dm.MWTOCMetaItem
from ve.dm.MWTOCDisableMetaItem and ve.dm.MWTOCForceMetaItem
These three now inherit from ve.dm.MWFlaggedMetaItem to avoid code duplication.
Change-Id: Ic8a9cdb1226dccac2c27e7f4b965c1590a7387c0
