Merge branch 'mid-may-2' into 'master'

Hash compatiblity check

See merge request gridtracker.org/gridtracker!315

If this is changing anything in the UI or operational behavior, please prepare to update the wiki!

package.nw/lib/gt.js

@@ -14435,7 +14435,7 @@ function mediaCheck()
   try
   {
     let fileExists = fs.existsSync(GT.NWappData + "internal_qso.json");
-    if (fileExists == true && GT.startVersion > 1240129)
+    if (fileExists == true && GT.startVersion > 1240511)
     {
       var data = JSON.parse(fs.readFileSync(GT.NWappData + "internal_qso.json"));
       GT.tracker = data.tracker;