Revert "no longer asks the user to choose a drive when init"

This reverts commit a4ef20c549e0f640d09fe8ced609a0624b2376f9.
updated i18n
fixed Chinese translation of tray icon menu
fixed a settings option
fixed settings loading
fixed a Chinese translation
added file browser
[filebrowser] part 2
remove defaultDownloadDir in flavor of QDesktopServices::storageLocation
[filebrowser] reset progress dialog when task finished
[filbrowser] fix redirect behaviour
[filebrowser] dialog is modaless now
[filebrowser] add border back to tabelview
Revert "remove defaultDownloadDir in flavor of QDesktopServices::storageLocation"

This reverts commit ef415b80b49941f153d3d2ffbda220b4c5c9c993.
[utils] enhance get_download_path func
[filebrowser] use download dir to save files as default
[filebrowser] fix openurl behaviou when downloading is finished
[filebrowser] improve progress dialog
[filebrowser] fix margins for progress dialog
[filebrowser] refactor network task