dialog shortcuts should receive higher prio than custom shortcuts

[axd1967]

Expected Behaviour

Shortcuts defined in dialogs (e.g. Alt-C in #1165) should always override a custom keyboard shortcut (F7)

Actual Behaviour

When attempting to run the calculation via keyboard (Alt-C), nothing happens. This is because a global shortcut is taking precedence and doing something else.

Steps to reproduce

1. Assign Alt-C to some custom action (e.g. "Show crosshairs")
2. open ephemeris dialog
3. press Alt-C
   Observe that the custom action is invoked instead.

System

• Stellarium version: 0.20.2.18060 (master)

• Operating system: KUbuntu 18.4

• Graphics Card: <Manufacturer (likely Intel, NVidia, AMD?), Model (HD, Geforce, Radeon..., with model number), driver version?>

• Screen type (if applicable): Resolution, HighDPI, scaling

Logfile

If possible, attach the logfile log.txt from your user data directory. Look into the Guide for its location.
log.txt

[alex-w]

Please check version 0.20.2.18074

[axd1967]

I have the impression that the test procedure no longer works: I cannot assign ALT+C?

possibly related to #1294

[axd1967]

A tip to remember: many (if not all?) dialogs capture the keyboard shortcuts, thus preventing general keys such as e.g. "a" for atmosphere to work, because a dialog has focus. Sometimes you want to interact with the dialog (eg time window) via mouse scrollwheel, and at the same time want to trigger other keyboard driven actions.

To achieve this, you have to remove the focus from all dialogs.

To do so, open and then close some other dialog such as the search dialog (F3) or bookmarks or whatever. This will take away the focus from dialogs that need to stay open (eg time dialog, landscape dialog, etc) and you will be able to combine scrollwheel mouse actions in a dialog with general keyboard actions.