Implement GUI for fixed size math delimiters (by Enrico Forestieri and me):

Implement GUI for fixed size math delimiters (by Enrico Forestieri and me):
	* src/lfuns.h
	(enum kb_action): New lfun LFUN_MATH_BIGDELIM

	* src/LyXAction.C
	(void LyXAction::init): New lfun LFUN_MATH_BIGDELIM

	* src/mathed/math_nestinset.C
	(void MathNestInset::doDispatch): remove debug message
	(void MathNestInset::doDispatch): remove LFUN_MATH_DELIM test for
	multiple cells (now in getStatus)
	(void MathNestInset::doDispatch): Handle LFUN_MATH_BIGDELIM
	(bool MathNestInset::getStatus): Disable LFUN_MATH_DELIM and
	LFUN_MATH_BIGDELIM when the selection spans multiple cells

	* src/frontends/qt3/ui/QDelimiterDialogBase.ui
	Added a combobox for selecting delimiter size.

	* src/frontends/qt3/QDelimiterDialog.[Ch]
	(fix_name, QDelimiterDialog, insertClicked, size_selected):
	Allow for fixed size delimiters.

	* src/frontends/gtk/GMathDelim.C: Add FIXME commnent for fixed size
	delimiters
	* src/frontends/qt4/QDelimiterDialog.C: ditto
	* src/frontends/xforms/FormMathsDelim.C: ditto

	* src/frontends/controllers/ControlMath.[Ch]:
	Added dispatchBigDelim() to deal with fixed size delimiters.

	* src/text3.C
	(void LyXText::dispatch): Handle LFUN_MATH_BIGDELIM
	(bool LyXText::getStatus): ditto

	* src/ToolbarBackend.C
	(string const ToolbarBackend::getIcon): Handle LFUN_MATH_BIGDELIM

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@13806 a592a061-630c-0410-9148-cb99ea01b6c8