Allow multiple cards to be selected in a card list,

Allow card actions to add/remove multiple cards.
not yet: actually use these multicard actions.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@853 0fc631ac-6414-0410-93d0-97cfa31319b6

src/mse.vcproj

@@ -1422,6 +1422,9 @@
 			<Filter
 				Name="action"
 				Filter="">
+				<File
+					RelativePath=".\data\action\generic.hpp">
+				</File>
 				<File
 					RelativePath=".\data\action\keyword.cpp">
 					<FileConfiguration