wizard: fix trezor initialisation/recover not setting page valid to True

add auto-proceed to next page after init to trezor, safe_t, keepkey

electrum/plugins/keepkey/qt.py

@@ -678,12 +678,14 @@ class WCKeepkeyInit(WizardComponent, Logger):
         def initialize_device_task(settings, method, device_id, handler):
             try:
                 self.plugin._initialize_device(settings, method, device_id, handler)
+                self.logger.info('Done initialize device')
                 self.valid = True
+                self.wizard.requestNext.emit()  # triggers Next GUI thread from event loop
             except Exception as e:
                 self.valid = False
                 self.error = repr(e)
             finally:
-                self.init_done()
+                self.busy = False
 
         t = threading.Thread(
             target=initialize_device_task,
@@ -691,9 +693,5 @@ class WCKeepkeyInit(WizardComponent, Logger):
             daemon=True)
         t.start()
 
-    def init_done(self):
-        self.logger.info('Done initialize device')
-        self.busy = False
-
     def apply(self):
         pass