Schedule type & web form changes

[sjmcculloch]

• Added schedule type to schedules and the "add new request" form
• Restructured "add new request" form and cleaned up method calls
• Added new components (ButtonPanel, FormGroupPanel, SchedulePriority, ScheduleType, DatePicker, Text)

[codecov[bot]]

Codecov Report

Merging #521 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #521   +/-   ##
=======================================
  Coverage   28.02%   28.02%           
=======================================
  Files         178      178           
  Lines        2901     2901           
  Branches      420      420           
=======================================
  Hits          813      813           
  Misses       1771     1771           
  Partials      317      317

Flag	Coverage Δ
#integration	0% <ø> (ø)	:arrow_up:
#unittests	28.57% <ø> (ø)	:arrow_up:

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