Try to fix store user design bug.

We now save the user design file every time we
click the save button, rather than when we exit
the game. Open the userdata/mp/templates.json
file to check that your template was correctly
stored.

src/design.cpp

@@ -3555,6 +3555,8 @@ void intProcessDesign(UDWORD id)
 		case IDDES_STOREBUTTON:
 			sCurrDesign.stored = !sCurrDesign.stored;	// Invert the current status
 			saveTemplate();
+			storeTemplates();
+			updateStoreButton(sCurrDesign.stored);
 			break;
 		case IDDES_SYSTEMBUTTON:
 			// Add the correct component form