Made desktopfolder adapt to changes in elementaryOS 6

[friberk]

I made some necessary changes to make desktopfolder work even more compatible with elementaryOS 6.

[Raphaelius]

Will DesktopFolder be integrated in the System settigns App. for good reason in Odin 6? &it woud be great, because it is nessesarry to use out of b!!!

[Raphaelius]

Will DesktopFolder be integrated in the System settigns App. for good reason in Odin 6? &it woud be great, because it is necessary to use out of b!!!

[friberk]

I do not think that Desktop Folder will be ever a part of the elementaryOS officially because of their desktopless design philosophy. On the other hand, there is some technical limitations for Desktop Folder when it comes to communicate with other core elementaryOS components, since it does not use elementaryOS's GTK framework Granite in order to function. So, Desktop Folder project needs at least a complete revision accordingly but the upstream seems to be dead which makes it not timeworthy to work with.

[3N37]

I cannot boot desktop folder on odin installed on disk.

[Radical4ever]

@friberk can you make it adapt to the accent colors?

[anjannair]

This pull request should be accepted as this is the one that is working in EOS6.

Thank you for this!