Remap backlight toggle and touch button (#3560)

* Update E-Ink display after sending adhoc ping or disable/enable GPS

* Resume display updates when touch button pressed

* Use touch hold as modifier; change double-click behavior for user button

* Fix preprocessor exclusions

* Purge backlight behavior

* Distinguish between 3x and 4x multi-presses

* Touch button considers "Wake screen on tap or motion" user-setting

* Don't assume device has BUTTON_PIN

* Rename misleading method

src/graphics/Screen.h

@@ -20,7 +20,7 @@ class Screen
     void setOn(bool) {}
     void print(const char *) {}
     void doDeepSleep() {}
-    void forceDisplay() {}
+    void forceDisplay(bool forceUiUpdate = false) {}
     void startBluetoothPinScreen(uint32_t pin) {}
     void stopBluetoothPinScreen() {}
     void startRebootScreen() {}
@@ -318,7 +318,7 @@ class Screen : public concurrency::OSThread
     int handleInputEvent(const InputEvent *arg);
 
     /// Used to force (super slow) eink displays to draw critical frames
-    void forceDisplay();
+    void forceDisplay(bool forceUiUpdate = false);
 
     /// Draws our SSL cert screen during boot (called from WebServer)
     void setSSLFrames();