Addons: tweak gui_mocks dialog timing to avoid leaving windows after … (#15022)

* Addons: tweak gui_mocks dialog timing to avoid leaving windows after testing.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/Mod/AddonManager/AddonManagerTest/gui/gui_mocks.py

@@ -45,7 +45,9 @@ class DialogInteractor(QtCore.QObject):
         self.execution_counter = 0
         self.timer = QtCore.QTimer()
         self.timer.timeout.connect(self.run)
-        self.timer.start(10)
+        self.timer.start(
+            1
+        )  # At 10 this occasionally left open dialogs; less than 1 produced failed tests
 
     def run(self):
         widget = QtWidgets.QApplication.activeModalWidget()