Prevent double slashes in group folder path parsing

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

src/gui/tray/usermodel.cpp

@@ -339,15 +339,22 @@ void User::parseNewGroupFolderPath(const QString &mountPoint)
     if (mountPoint.isEmpty()) {
         return;
     }
-    auto mountPointSplit = mountPoint.split(QLatin1Char('/'), Qt::SkipEmptyParts);
+
+    auto sanitisedMountPoint = mountPoint;
+    sanitisedMountPoint.replace("//", "/");
+    auto mountPointSplit = sanitisedMountPoint.split('/', Qt::SkipEmptyParts);
 
     if (mountPointSplit.isEmpty()) {
         return;
     }
 
     const auto groupFolderName = mountPointSplit.takeLast();
-    const auto parentPath = mountPointSplit.join(QLatin1Char('/'));
-    _trayFolderInfos.push_back(QVariant::fromValue(TrayFolderInfo{groupFolderName, parentPath, mountPoint, TrayFolderInfo::GroupFolder}));
+    const auto parentPath = mountPointSplit.join('/');
+    const auto folderInfo = TrayFolderInfo(
+        groupFolderName, parentPath, sanitisedMountPoint, TrayFolderInfo::GroupFolder
+    );
+    const auto folderInfoVariant = QVariant::fromValue(folderInfo);
+    _trayFolderInfos.push_back(folderInfoVariant);
 }
 
 void User::prePendGroupFoldersWithLocalFolder()