Add early exit to settings menu

Adds pressing both buttons to exit settings menu. #53

workspace/ts100/src/Modes.c

@@ -150,7 +150,14 @@ void ProcessUI() {
 			//The user pressed the button to breakout of the settings help prompt
 			StatusFlags = 0;
 		} else {
-			if (Buttons & BUT_B) {
+			if (Buttons == (BUT_A | BUT_B)) {
+
+				//Both buttons were pressed, exit back to the startup screen
+				settingsPage = 0;				//reset
+				operatingMode = STARTUP;	//reset back to the startup
+				saveSettings();					//Save the settings
+
+			} else if (Buttons & BUT_B) {
 				//A key iterates through the menu
 				if (settingsPage == SETTINGSOPTIONSCOUNT) {
 					//Roll off the end