Fix to a bug related to static component

[PanBartosz]

bytes(compName) does not work in Python 3 and because of that static component does not work too.
replacing it by str(compName) fixed the problem

[codecov-io]

Codecov Report

Merging #2124 into master will increase coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #2124      +/-   ##
==========================================
+ Coverage   42.93%   42.95%   +0.01%     
==========================================
  Files         215      215              
  Lines       37756    37756              
  Branches     6500     6500              
==========================================
+ Hits        16212    16218       +6     
+ Misses      19989    19985       -4     
+ Partials     1555     1553       -2

Impacted Files	Coverage Δ
psychopy/experiment/components/static/__init__.py	68.6% <0%> (ø)	⬆️
psychopy/visual/window.py	67.96% <0%> (+0.73%)	⬆️

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[coveralls]

Coverage increased (+0.01%) to 47.071% when pulling 835a947 on PanBartosz:patch-1 into fbefeea on psychopy:master.