Changing scripts in the script editor should reload script

[TheDuriel]

Godot version:

3.1

Issue description:

When you open a script in the script editor, by clicking on it in the left pane. The script is not reloaded. Currently a script is only reloaded error checked when you open it from disk (subsequently adding it to the script list), or make a change to its contents.

Lets say you have two scripts, A and B.

Script B uses script A through its class_name, but a script error in script A causes script B to correctly throw a script error/cyclic preload error.
Changing to script A, fixing the error, and changing back to script B does not resolve the error until a change is made to script B. (For example adding a space/new line, then removing it.)

[Anutrix]

i.e, parser doesn't do code_check unless a visible(i.e, is in same script not its dependency) change happens in the script?

[Ranoller]

Probably this was fixed by #28695 , but should test in master.

[Anutrix]

If it's still not fixed maybe call to reload_all_scripts() might work(Just a wild guess). But I am not sure if it'll cause performance issues.

[codecustard]

Could you provide a sample project?

[aaronfranke]

Can someone please provide a minimal reproduction project that shows the problem in the latest master branch?