Don't send send keys gesture if not connected

[SaschaCowley]

Link to issue number:

Fixes #17874

Summary of the issue:

Performing the "Toggle Control" gesture (NVDA+alt+tab) when no Remote Access session is in progress results in the gesture being sent to the operating system.

Description of user facing changes

The gesture is always trapped by NVDA.

Description of development approach

In remoteClient.client.RemoteClient.toggleRemoteKeyControl, no longer call gesture.send if there is no leader session. Also inform the user if not connected, if not connected as leader, or if there are no followers connected.

Testing strategy:

Performed the gesture:

• When not connected
• When connected as follower with no one else in the channel
• When connected as follower with a remote leader in the channel
• When connected as follower with a remote follower in the channel
• When connected as leader with no one else in the channel
• When connected as leader with a remote leader in the channel
• When connected as leader with a remote follower in the channel

Known issues with pull request:

None

Code Review Checklist:

• Documentation:
  • Change log entry
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English
• API is compatible with existing add-ons.
• Security precautions taken.

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