GUI: Add DropdownButtonWidget and use it in the launcher for mass add

DropdownButtonWidget is a button split in two parts vertically. Clicking
the left part triggers a default action. Clicking the right part shows a
list of other actions the user can choose from.

Using this widget on the launcher lets 'Mass add' be a secondary action
of the 'Add' button, removing the necessity of pressing the shift key to
access the feature.

1 files changed, 1 insertions, 6 deletions

diff --git a/gui/launcher.h b/gui/launcher.h
index 5bb386f9a0..7009b993f2 100644
--- a/gui/launcher.h
+++ b/gui/launcher.h
@@ -82,7 +82,6 @@ protected:
 	void updateListing();
 
 	void updateButtons();
-	void switchButtonsText(ButtonWidget *button, const char *normalText, const char *shiftedText);
 
 	void build();
 	void clean();
@@ -94,6 +93,7 @@ protected:
 	 * Handle "Add game..." button.
 	 */
 	virtual void addGame();
+	void massAddGame();
 
 	/**
 	 * Handle "Remove game..." button.
@@ -106,11 +106,6 @@ protected:
 	void editGame(int item);
 
 	/**
-	 * Facade for "Load..."/"Record..." buttons.
-	 */
-	void loadGameButtonPressed(int item);
-
-	/**
 	 * Handle "Record..." button.
 	 */
 	void recordGame(int item);