Change help text to be more helpful!

src/Settings/App.SettingsGroup.json

@@ -18,7 +18,7 @@
 {
     "name":             "OfflineEditingCruiseSpeed",
     "shortDescription": "Offline editing cruise speed",
-    "longDescription":  "This value defines the cruising speed for forward flight vehicles for use in calculating mission duration.",
+    "longDescription":  "This value defines the default cruising speed for forward flight vehicles for use in calculating mission statistics. It does not modify the flight speed for a specific flight plan.",
     "type":             "double",
     "defaultValue":     15.0,
     "min":              1.0,
@@ -28,7 +28,7 @@
 {
     "name":             "OfflineEditingHoverSpeed",
     "shortDescription": "Offline editing hover speed",
-    "longDescription":  "This value defines the cruising speed for multi-rotor vehicles for use in calculating mission duration.",
+    "longDescription":  "This value defines the default cruising speed for multi-rotor vehicles for use in calculating mission statistics. It does not modify the flight speed for a specific flight plan.",
     "type":             "double",
     "defaultValue":     5.0,
     "min":              1.0,