VFS: Tell the vfs plugin whether we have multiple accounts

This allows us to decide on the presentation of the account

src/common/vfs.h

@@ -62,6 +62,11 @@ struct OCSYNC_EXPORT VfsSetupParams
     QString providerName;
     QString providerVersion;
 
+    /** when registering with the system we might use
+     *  a different presentaton to identify the accounts
+     */
+    bool multipleAccountsRegistered = false;
+
     /** Whether native shell integration shall be enabled
      *
      * For some plugins that doesn't work well in tests.

src/gui/folder.cpp

@@ -16,6 +16,7 @@
 #include "config.h"
 
 #include "account.h"
+#include "accountmanager.h"
 #include "accountstate.h"
 #include "folder.h"
 #include "folderman.h"
@@ -476,6 +477,7 @@ void Folder::startVfs()
     vfsParams.journal = &_journal;
     vfsParams.providerName = Theme::instance()->appNameGUI();
     vfsParams.providerVersion = Theme::instance()->version();
+    vfsParams.multipleAccountsRegistered = AccountManager::instance()->accounts().size() > 1;
 
     connect(_vfs.data(), &Vfs::beginHydrating, this, &Folder::slotHydrationStarts);
     connect(_vfs.data(), &Vfs::doneHydrating, this, &Folder::slotHydrationDone);