Device GUIs: Constain window size via minimumSize/maximumSize, rather than handling resizeEvent. Add maximum button. Hide size buttons when window size is fixed

plugins/samplesource/localinput/localinputgui.cpp

@@ -29,7 +29,6 @@
 #include <QNetworkReply>
 #include <QJsonParseError>
 #include <QJsonObject>
-#include <QResizeEvent>
 
 #include "ui_localinputgui.h"
 #include "gui/colormapper.h"
@@ -76,7 +75,7 @@ LocalInputGui::LocalInputGui(DeviceUISet *deviceUISet, QWidget* parent) :
 
 	m_startingTimeStampms = 0;
     ui->setupUi(getContents());
-    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    sizeToContents();
     getContents()->setStyleSheet("#LocalInputGui { background-color: rgb(64, 64, 64); }");
     m_helpURL = "plugins/samplesource/localinput/readme.md";
 
@@ -146,12 +145,6 @@ bool LocalInputGui::deserialize(const QByteArray& data)
     }
 }
 
-void LocalInputGui::resizeEvent(QResizeEvent* size)
-{
-    adjustSize();
-    size->accept();
-}
-
 bool LocalInputGui::handleMessage(const Message& message)
 {
     if (LocalInput::MsgConfigureLocalInput::match(message))