Add setting to show Presets tab first

src/Settings/PlanView.SettingsGroup.json

@@ -1,2 +1,8 @@
 [
+{
+    "name":             "displayPresetsTabFirst",
+    "shortDescription": "Display the presets tab at start",
+    "type":             "bool",
+    "defaultValue":     false
+}
 ]

src/Settings/PlanViewSettings.cc

@@ -16,3 +16,5 @@ DECLARE_SETTINGGROUP(PlanView, "PlanView")
 {
     qmlRegisterUncreatableType<PlanViewSettings>("QGroundControl.SettingsManager", 1, 0, "PlanViewSettings", "Reference only"); \
 }
+
+DECLARE_SETTINGSFACT(PlanViewSettings, displayPresetsTabFirst)

src/Settings/PlanViewSettings.h

@@ -17,6 +17,8 @@ class PlanViewSettings : public SettingsGroup
 public:
     PlanViewSettings(QObject* parent = nullptr);
     DEFINE_SETTING_NAME_GROUP()
-    // This is currently only used to set custom build visibility of the Plan view settings ui.
-    // The settings themselves related to PlanView are in still in AppSettings due to historical reasons.
+
+    // Most individual settings related to PlanView are still in AppSettings due to historical reasons.
+
+    DEFINE_SETTINGFACT(displayPresetsTabFirst)
 };