[Feature Request]: Allow for more shortcuts in code/script transforms

### What would you like to happen?

In the User Defined Java Class transform (and other similar transforms, as JavaScript) a couple of typically supported shortcuts do not work:
* CTRL+Y (redo)
* CTRL+F (search)
* optionally: CTRL+S (save)

It would be very practical to have them available, as virtually every editor supports them also.

### Issue Priority

Priority: 3

### Issue Component

Component: Hop Gui

Start by inspecting the User Defined Java Class transform and the similar JavaScript transform to find where editor shortcuts are handled. Verify how CTRL+Y and CTRL+F behave, consider the optional CTRL+S request, and confirm the supported shortcuts work consistently in the Hop GUI.

Written by the indexing model from the issue text.