Remove usages of deprecated apply() builtin

gui/qt/installwizard.py

@@ -87,7 +87,7 @@ def wizard_dialog(func):
         #    out = ()
         if type(out) is not tuple:
             out = (out,)
-        apply(run_next, out)
+        run_next(*out)
     return func_wrapper
 
 

gui/qt/main_window.py

@@ -1708,7 +1708,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
         c = commands.Commands(self.config, self.wallet, self.network, lambda: self.console.set_json(True))
         methods = {}
         def mkfunc(f, method):
-            return lambda *args: apply( f, (method, args, self.password_dialog ))
+            return lambda *args: f(method, args, self.password_dialog)
         for m in dir(c):
             if m[0]=='_' or m in ['network','wallet']: continue
             methods[m] = mkfunc(c._run, m)

gui/qt/util.py

@@ -69,7 +69,7 @@ class EnterButton(QPushButton):
 
     def keyPressEvent(self, e):
         if e.key() == Qt.Key_Return:
-            apply(self.func,())
+            self.func()
 
 
 class ThreadedButton(QPushButton):