v3.0.0-rc.6

• added drag and drop of files to the to directory tree and directories in the current perspective
• clear selected files after closing the file rename dialog
• fixing issue with clearing selection on dir change
• fixing tray icon on Linux
• restoring hover effect on tags in grid perspective
• improving icons for native apps
• improving the WebDAV implementation
• fix file and directory properties empty in the web version
• added drag and drop of files from desktop in the web version
• fix file download button in the web version
• fixing tray icon on win and mac #781
• fixing name of current folder under windows
• hiding last modification date for folders in list view
• added parent directories navigation, showing the last two directories
• let the worker generate only one batch of thumbs at once
• added open in file manager functionality to the folder menu of grid perspective
• limiting the length of the directory name in directory tree to 25 chars