mattcasters opened a new pull request, #8695:
URL: https://github.com/apache/hop/pull/8695

   Script and Java editors (User Defined Java Class, JavaScript/Script, Java 
Filter, formula, and the other StyledText editors) already kept an undo stack, 
but Ctrl+Z was not consumed. The same chord then undid the pipeline or workflow 
and moved focus back to the graph, so undo inside the editor did not stick. 
Redo was only Ctrl+Shift+Z. Ctrl+Y did nothing. Ctrl+F already opens find.
   
   Ctrl+Z now undoes and Ctrl+Y redoes in those editors, and both chords are 
consumed so the graph shortcut does not run. Ctrl+Shift+Z still redoes. 
Applying undo or redo no longer records itself as a new edit, and a later edit 
clears redo. The editor context menu shows Ctrl+Y.
   
   Ctrl+S was left unchanged. The request marks it as optional, and it is not 
specified whether that should accept the dialog or save the pipeline. Hop Web 
script tabs still use a plain text control with no undo stack, so this does not 
add history there.
   
   Tests: `./mvnw -pl ui -am test -Dtest=HopGuiKeyHandlerTest 
-Dsurefire.failIfNoSpecifiedTests=false` (15 tests, passed) and 
`tools/with-isolated-display.sh ./mvnw -pl rcp -am test 
-Dtest=StyledTextVarHistoryShortcutTest 
-Dsurefire.failIfNoSpecifiedTests=false` (passed). A full reactor build was not 
run.
   
   fixes #4940
   
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