add option to disable keybindings fixing #1251

[MayNiklas]

This would fix #1251
The keybindings conflict with important characters on Mac keyboards.
Currently for example {} always get replaced with ´©{¥}`, especially problematic in workflows using barcode scanners.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 54.59%. Comparing base (70cde4c) to head (a61164b).
⚠️ Report is 30 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1254      +/-   ##
============================================
- Coverage     54.77%   54.59%   -0.18%     
- Complexity     8012     8107      +95     
============================================
  Files           601      606       +5     
  Lines         25690    26014     +324     
============================================
+ Hits          14072    14203     +131     
- Misses        11618    11811     +193     

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[jbtronics]

Thanks.

Ideally this should be configurable on a per-user level, but this way is fine for now.
I plan to extend the settings-bundle for user based settings in the future, then this should be an easy extension.