* InsetTabular cleanup:

* InsetTabular cleanup:
- proper message passing for all tabular features
- properly define which feature needs an argument

* replace LFUN_TABULAR_FEATURE with LFUN_INSET_MODIFY
- The math tables are also affected. In the future a common base class
between math and text table will solve this inconsistency.
- There is a hack in GuiApplication in order to not rename the toolbar
icons. This will have to be cleaned up with a general icon naming for
LFUN_INSET_MODIFY... to be discussed.

* Tabular Dialog:
- big cleanup, lots and lots of bug fixing here
- migrated to InsetParamsWidget

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@33495 a592a061-630c-0410-9148-cb99ea01b6c8