Test: auto save after delay

[bpasero]

Refs: #84672

• anyOS @sandy081
• anyOS @fiveisprime

Complexity: 2

This milestone, auto save after delay was rewritten to work with custom editors. This test plan item is to verify there are no regressions for existing text based editors.

Steps:

• enable auto save after delay
  • try with the default of 1s
  • try with a higher delay
• verify files get saved after this delay
• verify you see no dirty indicator if you have the default auto save delay of 1s
• verify untitled files are not getting saved automatically
• verify you can quit right after making a change to a file before it gets saved automatically and that on startup the file is shows as saved and has your changes