FP-1.06: Display "Shared with Me" Section

[dj4oC]

As a user of the Messenger with the integrated ownCloud Infinite Scale File Picker,
I want to see the content of the "Shared with Me"-tab within the "Shares" area, just like it is in ownCloud Web,
So that I can easily access with files and folders that others have shared with me.

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Acceptance Criteria:

1. Consistent Experience:

   • When I open the ownCloud File Picker from the Messenger, the interface should show the conent of the "shared with me"-Tab of ownCloud Web.

2. Visibility of "Shared with Me":

   • "Shared with Me" Section should be present next to personal space and spaces.
   • This section should list all files and folders that other users have shared with me.

3. Interactive List:

   • I should be able to click on any item within the "Shared with Me" subfolder to forward the file/folder or the link (if resharing is allowed).

cc @hodyroff @tbsbdr @JammingBen

[dj4oC]

@AversaFTW
Please review

[dj4oC]

@tbsbdr @kulmann please check the test results:

Unterordner "Mit mir geteilt" wird angezeigt, Verschicken eines Ordners funktioniert aber nicht -> Ordner wird gezippt, Inhalt: undefined; 
Verschicken der in dem Ordner enthaltenen Dateien (eine oder mehrere) funktioniert; 
Verschicken von Dateien, die geteilt wurden, aber nicht in einem Ordner liegen, funktioniert nicht -> Dateiname wird zu einer langen alphanumerischen Zeichenkette ohne Dateiendung 

[kulmann]

The three findings you mentioned are bugs in the messenger implementation.