VE: Register sequence with CommandHelp

Depends on I65e2bfc2 in VE-MW

Change-Id: I8f71b1b242cb5c273c6d4a16bdfef6bf1e0adb55

modules/ve-math/ve.ui.MWMathInspectorTool.js

@@ -39,3 +39,8 @@ ve.ui.commandRegistry.register(
 ve.ui.sequenceRegistry.register(
 	new ve.ui.Sequence( 'wikitextMath', 'math', '<math', 5 )
 );
+
+ve.ui.commandHelpRegistry.register( 'insert', 'math', {
+	sequences: [ 'wikitextMath' ],
+	label: OO.ui.deferMsg( 'math-visualeditor-mwmathinspector-title' )
+} );