Code and GUI text cleanup (#926)

* Move int range checkers from options class to common file
* Improve error handling and reporting
* Make some minor improvements to init and test suite
* Fix 'trypewriter' to 'typewriter' typo
* Remove menu path description in dialog help text
* Improve the help text for entries in the Format menu
* Reword a couple of dialog messages

tests/test_tools/test_tools_projwizard.py

@@ -40,17 +40,15 @@ stepDelay = 20
 
 
 @pytest.mark.gui
+@pytest.mark.skipif(sys.platform.startswith("darwin"), reason="Not running on Darwin")
 def testToolProjectWizard_Main(qtbot, monkeypatch, nwGUI, nwMinimal):
     """Test the new project wizard.
+    Disabled for macOS because the test segfaults on QWizard.show()
     """
     # Block message box
     monkeypatch.setattr(QMessageBox, "question", lambda *a: QMessageBox.Yes)
     monkeypatch.setattr(QMessageBox, "critical", lambda *a: QMessageBox.Yes)
 
-    if sys.platform.startswith("darwin"):
-        # Disable for macOS because the test segfaults on QWizard.show()
-        return
-
     ##
     #  Test New Project Function
     ##