update xml schema
add implementation of unit selection in OiExchange interface
bugfix: GUIConfiguration column time at position 38 after scale
bugfix: display correct string parameters in sensor plugin dialog
bugfix: when multiselecting observations in function plugin loader not all of them were set as used elements (sometimes crash) + show id insted of time in function plugin loader (observations)
bugfix: error message when trying to import nominals without a valid plugin
bugfix: load project when plugins were used that are not available now
bugfix: sensor config (no empty space in attribute name)
load project: set instrument initially to NULL and later to the stations active sensor
bugfix: no measurement config for nominal geometries
bugfix: when measuring a nominal (automatic actual creation) use the default mConfig
bugfix: show display name of configs (to distinguish between saved and unsaved ones) + update config models after loading a project
bugfix: always select the default sensor config on init and show the corresponding plugin in table view
Revert "bugfix: always select the default sensor config on init and show the corresponding plugin in table view"

This reverts commit 7870fe7522394bcc70ec72cfcc71b12a96511f6d.
Merge branch 'master' into OpenCascadeCAD