Change editor & dashboard buttons to anchors

[Steve-Mcl]

closes #4355

Description

• Adds type="anchor" support to ff-button
• Changes the dashboard button to type anchor
• Changes the editor button to type anchor but still supports left click into immersive mode

NOTE: 3 tests using should('be.disabled') needed to be changed to test for attr disabled instead. See cypress-io/cypress#5903

NOTE: The new anchor operates exactly like the old button.

• If Left Clicking "Editor" and it is immersive ready, it will be shown immersive however, if the user middle clicks or right clicks, the editor can be opened in a new tab (as per browser behaviour)
• Left clicking the dashboard opens as a new tab as it always did (targeted to a specific target to prevent multiple windows) however now it isa n anchor, middle click and right click can open another instance in a new tab (as per browser behaviour)

Related Issue(s)

#4355

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.34%. Comparing base (dd070d7) to head (c9fb9e5).
Report is 38 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4396   +/-   ##
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  Coverage   78.34%   78.34%           
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  Files         293      293           
  Lines       13571    13571           
  Branches     3052     3052           
=======================================
  Hits        10632    10632           
  Misses       2939     2939           

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