Revert "Prevent the dialogs to be hidden behind the main window"

This reverts commit f72574d1ad.

plugins/feature/map/mapgui.cpp

@@ -198,9 +198,9 @@ MapGUI::MapGUI(PluginAPI* pluginAPI, FeatureUISet *featureUISet, Feature *featur
     m_polygonMapModel(this),
     m_polylineMapModel(this),
     m_beacons(nullptr),
-    m_beaconDialog(this, this),
-    m_ibpBeaconDialog(this, this),
-    m_radioTimeDialog(this, this),
+    m_beaconDialog(this),
+    m_ibpBeaconDialog(this),
+    m_radioTimeDialog(this),
     m_cesium(nullptr),
     m_legend(nullptr),
     m_nasaWidget(nullptr),