[INTERNAL][FIX] Core: JSDoc "ThemeChanged" Event / minor JSDoc fixes
[INTERNAL][FIX] Core: JSDoc "ThemeChanged" Event / minor JSDoc fixes

With b7669fbf7a0c858a5d7a5a887583ce2b68b35916 the "ThemeChanged"
event was changed to use camelCase which was wrong.
It should be as it was before as the value of the "Core.M_EVENTS"
map was always "ThemeChanged".

Change-Id: I2485205e1c78f69799900f412c976672be230974

cschuff/openui5,cschuff/openui5,olirogers/openui5,SAP/openui5,SAP/openui5,cschuff/openui5,olirogers/openui5,nzamani/openui5,nzamani/openui5,olirogers/openui5,SQCLabs/openui5,SAP/openui5,SQCLabs/openui5,SAP/openui5,nzamani/openui5,SQCLabs/openui5