Import-Editor, GUI fixes, signal fixed, performance improvement

• new signals are now not plotted by default. This increases
  performance, when loading big data

• Added: Auto-File-Backup

• Added: Plugin - RealTime-Editor (DevicesRAW)

• Two save-session modes (when overwriting sessions):

  • Overwrite session
  • Append to session (no data is lost)

• PlotStyles are now saved automatically for new signals

• menubar now icons

• Import-Subwindow:

  • Import CSV, Matlab (.mat), RTOC-session, XLSX, ODF
  • Edit imported data and create signals from it.
  • Drag'n'drop files and selected tables

• fixed bug with multiple plot windows (on close)

• fixed linux GUI-icons

• fixed some signalwidget-bugs

• fixed crashed of PluginDownloader

• fixed swapXY-signals

• fixed elapsed time of signal in mouseover on signalbuttons

Upcoming:
Integration of NetWoRTOC to RTOC