Udpate 2.2.3

+ Added timeout for online request regarding location info and altitude value
+ Possibility to open more than one track by using multiselection in open track dialog
+ Possibility to show tracks which don’t include date time information
+ New options for online requests of location infos and altitude values when assigning coordinates from map
! When synchronizing with track folders, sometimes the wrong tracks had been shown on the map
! The option “Overwrite original images” and “Preserve date time” didn’t work in some situations
! Other minor bugfixes