Remove most undefined variables issues in javascript files

[cbowman0]

Most were global variables defined in the templated html files or other included javascript files.
Others needed var/const declarations.

Only ones left are:

  2703:14  error  'ace' is not defined                                            no-undef
  2705:20  error  'require' is not defined                                        no-undef
  2802:19  error  'newURL' is not defined                                         no-undef
  2803:36  error  'newURL' is not defined                                         no-undef
  3333:55  error  'reset_params' is not defined                                   no-undef

[codecov-io]

Codecov Report

Merging #2149 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2149   +/-   ##
=======================================
  Coverage   77.96%   77.96%           
=======================================
  Files          80       80           
  Lines        8331     8331           
  Branches     1874     1874           
=======================================
  Hits         6495     6495           
  Misses       1573     1573           
  Partials      263      263

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