Support model specific gestures for braille displays when working with modifiers

[LeonarddeR]

Link to issue number:

None, however related to #6213 and #7517

Summary of the issue:

#6213 added support for braille display key modifiers, #7517 added model specific gestures. However, these systems did not respect each other, meaning that it was not possible to combine modifiers and model specific gestures

Description of how this pull request fixes the issue, based on Testing performed:

When one display key is assigned to alt and the other key is assigned to downArrow, combining both keys will result in the execution of alt+downArrow, also when neither, either or both of the two are model specific.

This also fixes a trivial bug in the handyTech driver where a model name for an input gesture contained a space, which does not follow the specs in braille.BrailleDisplayGesture.

Known issues with pull request:

None

Change log entry:

• Bug fixes
  • Braille display gestures that emulate system keyboard key modifiers can now also be combined with other emulated system keyboard keys if one or more of the involved gestures are model specific.