#23 introducing notification panel for completed downloads
#23 using downloadmanager icon in status bar
#23 using window to slide in download notification
#23 opening dowload dialog when double clicking the notification window!
#23 adjusting insets of notification panel
#23 float in animation for notification
#23 adjusting label insets of status bar labels
#23 jalopy formatting
#23 showing different notifications for completed and erroneous downloads, erroneous and cancelled downloads status are counted as done
#23 display time for download notification is configurable in download options
#23 minor layout changes for new download notififcation display time spinner
#23 wrong editable state of DownloadManager clear button
#23 added accidentially deleted image
Merge branch 'feature/23-downloadManager-status-bar' into dev