Style forms using django-bootstrap-form 3.4

[hartwork]

Candidate for #608.

Potentially one of the least invasive approaches to apply Bootstrap3 styling. field.help_text was removed so that it's not shown twice.

Project home:

• https://github.com/tzangms/django-bootstrap-form
• https://pypi.org/project/django-bootstrap-form/

[codecov[bot]]

Codecov Report

Merging #614 into master will decrease coverage by 0.01%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #614      +/-   ##
==========================================
- Coverage   80.99%   80.97%   -0.02%     
==========================================
  Files          45       45              
  Lines        2920     2917       -3     
  Branches      177      177              
==========================================
- Hits         2365     2362       -3     
  Misses        497      497              
  Partials       58       58

Impacted Files	Coverage Δ
cabot/settings.py	68.42% <ø> (ø)	:arrow_up:
...t/templates/cabotapp/alertpluginuserdata_form.html	97.36% <100%> (ø)	:arrow_up:
cabot/templates/cabotapp/plugin_settings_form.html	98.63% <100%> (ø)	:arrow_up:
cabot/templates/cabotapp/_base_form.html	75.86% <100%> (-2.27%)	:arrow_down:

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