Common - Add keycombo support for FUNC(disableUserInput)

[johnb432]

When merged this pull request will:

• Title.
• Alternative to Common - Add function to check if action with modifier being pressed #9594.
• Several other small improvements:
  • Abort and respawn buttons have more accurate texts and tooltips.
  • Some code cleanup.

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• Title of this PR uses our standard template Component - Add|Fix|Improve|Change|Make|Remove {changes}.