Various improvements (#614)

- Auto-select widgets in Launcher and apps with toolbars on devices without touch.
- Improved USB HID input reliability, cleanup
- Updated PSRAM settings to improve boot stability on supported devices.
- Prevented duplicate Wi-Fi event subscriptions during screen rebuilds.
- Updated docs
- Fixes in WifiManage and WifiConnect
- Reduced main task stack size
- Moved USB HID stack size to PSRAM when available
- app_manager_find_manifest() now returns a copy instead of a pointer

Tactility/Private/Tactility/app/wifimanage/View.h

@@ -36,6 +36,9 @@ public:
 
     void init(uint32_t appInstanceId, lv_obj_t* parent);
     void update();
+    /** Called when this window's widgets have been (or are about to be) deleted out from under
+     * it - see WindowDestroyWidgetsFn. Only nulls out pointers; must stay lock-free. */
+    void reset();
 };