Add DialogPositioner to ensure dialogs are fully on screen and remain on

screen when screen orientation changes.
Add DialPopup to allow dials to adjusted with a slider, which is easier
on touchscreens.
Add TableTapAndHold to support table context menus on touchscreens.

plugins/channeltx/udpsource/udpsourcegui.cpp

@@ -25,6 +25,8 @@
 #include "util/db.h"
 #include "gui/basicchannelsettingsdialog.h"
 #include "gui/devicestreamselectiondialog.h"
+#include "gui/dialpopup.h"
+#include "gui/dialogpositioner.h"
 #include "plugin/pluginapi.h"
 #include "maincore.h"
 
@@ -171,6 +173,7 @@ UDPSourceGUI::UDPSourceGUI(PluginAPI* pluginAPI, DeviceUISet *deviceUISet, Baseb
     displaySettings();
     makeUIConnections();
     applySettings(true);
+    DialPopup::addPopupsToChildDials(this);
 }
 
 UDPSourceGUI::~UDPSourceGUI()
@@ -505,6 +508,7 @@ void UDPSourceGUI::onMenuDialogCalled(const QPoint &p)
         }
 
         dialog.move(p);
+        new DialogPositioner(&dialog, false);
         dialog.exec();
 
         m_settings.m_rgbColor = m_channelMarker.getColor().rgb();