Bug 406617

I am currently moving from atom to kate and have some difficulty getting the combination of settings I want for a project. The project uses a .editorconfig for consistent indentation and other general settings and this works fine. Unfortunately this does not support connecting a file type to a glob, which means syntax highlighting does not always work properly (In particular with templating languages or files with extensions that are otherwise not directly mappable to their syntax).

So I decided to use a personal .kateconfig file with document variables to set the syntax. However after that the editorconfig settings were no longer applied. I did read that KatePart prioritizes .kateconfig files, but I did not expect the editorconfig to be ignored completely.

So I would like kate to read them both, so I can leverage kate-wildcard document variables for stuff that editorconfig doesn't handle. I suggest reading configuration like this (Altered from https://docs.kde.org/stable5/en/applications/katepart/config-variables.html):

 - The global configuration.
 - Optional session data.
 - The "Filetype" configuration.
 > - Properties in .editorconfig. <
 - Document variables in .kateconfig.
 - Document variables in the document itself.
 - Settings made during editing from menu or command line.

NOTE: From a project "I want consistent settings" perspective it would make more sense to prioritize editorconfig, but from the editor perspective prioritizing the editor specific configuration makes more sense. It's tricky because both configurations work at the same logical level.