BF: Sets Mac PTB value of keycode 43 to tab (was escape)

[dvbridges]

No description provided.

[coveralls]

Coverage decreased (-0.1%) to 48.922% when pulling 7624c9f on dvbridges:macKeyboard into 48da5f5 on psychopy:master.

[codecov-io]

Codecov Report

Merging #2620 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2620      +/-   ##
==========================================
+ Coverage   44.31%   44.33%   +0.01%     
==========================================
  Files         234      234              
  Lines       42083    42083              
  Branches     7272     7272              
==========================================
+ Hits        18651    18659       +8     
+ Misses      21443    21437       -6     
+ Partials     1989     1987       -2

Impacted Files	Coverage Δ
psychopy/hardware/keyboard.py	30.33% <ø> (ø)	⬆️
psychopy/app/dialogs.py	29.21% <0%> (ø)	⬆️
psychopy/tools/wizard.py	73.74% <0%> (+0.43%)	⬆️
psychopy/visual/window.py	65.16% <0%> (+0.58%)	⬆️

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