Some settings don't use "Find file/directory" dialog

[CitrusWire]

Godot version:
3.2.3 on Windows 7

Issue description:
There's some degree of inconsistency in the use of "Find file"/"Find Directory" helper dialog when setting settings for Project Settings. Many settings use these (good), but the following do not (bad):

Project settings -> General

• Application/Config -> "Custom User Dir Name"
• Application/Config -> "Project Settings Override"
• Logging/FileLogging -> Log Path (This one is also wrongly named - it's a Log File, not a Log Path).

I believe that's all of the missing ones for the General Tab.

Project settings -> Plugins

• Create -> "SubFolder" and possibly "Script Name".

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The Editor Settings all seem to be fine.

[akien-mga]

Project settings -> General

• Application/Config -> "Custom User Dir Name"
• Application/Config -> "Project Settings Override"
• Logging/FileLogging -> Log Path (This one is also wrongly named - it's a Log File, not a Log Path).

I think those are all fine as is. They're not folder or file paths (C:\Users\blabla\AppData\My Game) but folder or file names that will be appended automatically to the relevant system path (e.g. My Game for application/config/custom_user_dir_name).
You can't choose any path for this custom user dir, it will be placed in the system-specific folder dedicated to application data (%APPDATA% on Windows, XDG_DATA_HOME on Linux, etc.).

Same thing for Project Settings Override which should be the relative path of a file in the virtual user:// filesystem. The actual location on disk of user:// depends on the OS and the value of application/config/custom_user_dir_name, so it doesn't make sense to let you select it with a file dialog as this would be specific to your own OS and user session.

Same thing for the log file path, which is also relative to user://.

Project settings -> Plugins

• Create -> "SubFolder" and possibly "Script Name".

This one can make sense yes. But note that currently it's the path of a folder which you ask the plugins creation dialog to create for you, to place a newly created script file in it with the given name. If you have to use a File Dialog to select the folder, then you have to create it yourself instead of letting this creation tool do it for you. Similarly, if you want to use a file dialog for the script name, you'd have to create the script beforehand. At this point you've already done half of the work that this plugin creation helper does.