Pressing space when entering the name of an editor layout confirm the save dialog

[mieldepoche]

Godot version

4.1.1

System information

linux

Issue description

simplescreenrecorder-2023-08-30_15.01.51.webm

I guess this wasn't the case before since I could save a layout named "2 monitors".

Steps to reproduce

press space

Minimal reproduction project

none

[jsjtxietian]

Related to #77297
Before it the _line_gui_input only accepts Enter and Escape, but now it utilizes key mapping ui_accept which contains Space key as well.

This is a LineEdit class for user to type in some string, maybe we do not need to use ui_accept here ? @puchik Any thoughts?

[puchik]

Kind of a weird one because it's obviously not great behaviour but it's still not optimal to hardcode the enter key and/or break consistency.

Maybe the best solution is to leave the ui_accept as its mapping but exclude the space key (i.e., "if ui_accept and not Space").

The only downside to that is it'll break if ui_accept is only Space, but that's kind of an unusual decision 😛 I think "hijacking" the space bar input in this use case makes sense