Only show switch to edit old dynamics if app has rulehandler

[standeren]

Description

• Move logic to switch between old and new dynamics to new dynamics component
• Use a regular state that does not involve feature flags
• Remove expressions as a feature
• Make default selected dynamics editor as new expressions
• Only show switch to use old dynamics if app has rulehandler file

NB

Need to delete the ruleHandlerObject from the window object. The window object will remember that the ruleHandler was fetched from another layoutset when switching to a layoutset that does not have the ruleHandler ⚠️

Verification

• Your code builds clean without any errors or warnings
• Manual testing done (required)
• Relevant automated test added (if you find this hard, leave it and we'll help out)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1000e5d) 86.97% compared to head (592c87a) 86.90%.
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #11914      +/-   ##
==========================================
- Coverage   86.97%   86.90%   -0.07%     
==========================================
  Files         927      928       +1     
  Lines       13146    13161      +15     
  Branches     1599     1604       +5     
==========================================
+ Hits        11434    11438       +4     
- Misses       1491     1507      +16     
+ Partials      221      216       -5     

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