Bug 1052343 part.2 Don't assume that there is nsTextStore instance even during in TSF mode r=emk
Bug 1052343 part.3 Create TSFStaticSink for listening to some TSF events for whole life time of our process r=emk
Bug 1052343 part.4 Remove nsTextStore::sFlushTIPInputMessage which is no longer used r=emk
Bug 1052343 part.5 Recreate nsTextStore instance at each focus change r=emk
Bug 1052343 part.6 Don't destroy nsTextStore instance during it's locking the document r=emk