Linux: file connection disappears due to lowercase

[jkiviluo]

Toolbox likes to change things in project.json to lowercase, but Linux is case-sensitive. So, I lose file connection when they have capital letters (at least in Data store properties, but probably elsewhere too).

[ptsavol]

Looks like we use os.path.normcase to make urls (sqlite:/// etc.) into lower case even if the sqlite file name or path contains capital letters. I see how that could be a problem on Linux but it seems that it's intentional because we even have tests for this. @soininen do you know what's going on here?

[soininen]

I don't remember. normcase() makes sense on Windows and MacOS, of course but I too can see it will cause problems on Linux.