Fixes
* improve channel group flags when appending bus logging structures
* fix CAN extraction of multiplexed signals
* improve plot performance
* improve GUI description for Channel and Channel group pop-up windows
* keep structure channels when filtering files
* apply remove_source_from_channel_names to the channel's display name
* fixes 335, 339, 348, 352
Changes
* refactored CAN bus logging handling on loading a measurement
* add raw values support in plot
* add the possibility to use multiple windows in the comparison mode
* add raw channel group raw record bytes viewer
* add channel selection right click menu entry for displaying file properties
* show structure channel composition in GUI
* add cursor marker with comments to the plot GUI
* display Event markers when loading a plot