A few Kobo input tweaks (#4450)

* Fix the Touch input probe on Trilogy devices that depend on the touch_probe_ev_epoch_time quirk (fix #630)
* Expose a "Pageturn button inversion" feature in the Navigation menu (for all devices with keys) (fix #4446)
* Allow ignoring the accelerometer on the Forma (Screen > Ignore accelerometer rotation events; also available from the Gesture Manager) (fix #4451)
* Fix SleepCover handling on the Forma (fix #4457)
* Make isWifiOn a tiny bit more accurate (check the actual WiFi module instead of sdio_wifi_pwr)
* Move all flash related Screen options to the eInk submenu

frontend/device/input.lua

@@ -659,6 +659,16 @@ function Input:handleMiscEvNTX(ev)
     end
 end
 
+-- Allow toggling it at runtime
+function Input:toggleMiscEvNTX()
+    if self.isNTXAccelHooked then
+        self.handleMiscEv = function() end
+    else
+        self.handleMiscEv = self.handleMiscEvNTX
+    end
+
+    self.isNTXAccelHooked = not self.isNTXAccelHooked
+end
 
 -- helpers for touch event data management:
 
@@ -705,6 +715,10 @@ function Input:isEvKeyPress(ev)
     return ev.value == EVENT_VALUE_KEY_PRESS
 end
 
+function Input:isEvKeyRepeat(ev)
+    return ev.value == EVENT_VALUE_KEY_REPEAT
+end
+
 function Input:isEvKeyRelease(ev)
     return ev.value == EVENT_VALUE_KEY_RELEASE
 end