Make Goto line a Popup and column input

[kitbdev]

• originally a part of Overhaul multicaret editing and selection in TextEdit #86978
• Edit: should be merged after Fix goto line issues in code editor #94002

Changes Goto Line Dialog to be a popup, since it should be transient. Clicking outside will close it.
Allows inputting column after the line, after a :. This is actually the character position, so tabs count as 1 and not 4. It also starts at 1, like the line number. If the column number is too high or too low, it will be clamped to the line length.

Live navigation, the editor will move to the line immediately without needing to confirm.
Pressing Enter closes the popup. Even if there is no number.
Pressing Esc closes and returns to the original position (using navigation state).
The default popup position is at the top center of the TextEditor it is on.

Fixes Goto line not deselecting.
Goto Line now centers to the line and sets the caret column to 0.

[KoBeWi]

Using EditorSpinSlider won't allow inputting columns (e.g. 100:20) if we ever want to support that.

[kitbdev]

Yeah, I think column support is probably more important than expression support here.
The EditorSpinSlider isn't the best fit anyway, since it starts focused and the buttons on it are only available after unfocusing it with tab.
It would also be nice to have live changes.
I'll make some changes.

[kitbdev]

Updated

• allows column number input.
• goes to line immediately (can cancel to return).
• no longer supports expressions.

[KoBeWi]

Closing the popup by clicking will select text:

godot.windows.editor.dev.x86_64_s32gP0CKPS.mp4

[kitbdev]

That looks like a preexisting issue:

• Text is selected unexpectedly in script editor when left clicking after opening a context menu #95471

It would have to fixed in the TextEdit itself, and I think it can be fixed separately.

[Calinou]

Tested locally (rebased on top of master 7187c25), it works as expected.

I noticed a few UX issues though:

• The undo/redo navigation will take all steps of the action into account, including when you write the first digits of the line number. For instance, if you want to go to line 123, there will be 3 actions stored:

  • Go to line 1
  • Go to line 12
  • Go to line 123

• To go back to the location you were at previously, you need to undo the navigation 3 times, even if you press Escape and don't confirm the dialog.

  • I like the idea of this "live preview", but it should only store the navigation state after you confirm the dialog by pressing Enter.

• Pressing Escape after entering some numbers should also restore the old navigation history. Right now, when you enter numbers then press Escape, the numbers you entered up to that point will be part of the navigation history, even though you were (correctly) sent back to the location you were at before entering anything.

[kitbdev]

Updated so previewing line changes does not affect the navigation history.

[Repiteo]

Thanks!