Resize list of stylesheets to fit available space

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1138 0fc631ac-6414-0410-93d0-97cfa31319b6

src/gui/control/package_list.cpp

@@ -100,3 +100,7 @@ void PackageList::select(const String& name, bool send_event) {
 	update();
 	return;
 }
+
+int PackageList::requiredWidth() const {
+	return (item_size.x + SPACING) * (int)itemCount();
+}