[libcalamaresui] Move waitingspinnerwidget.* into calamaresui

Although this is 3rd-party code, it now diverges -- by merging the
stale PR from upstream, and from adding features of our own --
enough that we should not pretend that it is the original 3rdparty
code.

Chase a couple of include paths that called this from 3rdparty/

src/libcalamaresui/CMakeLists.txt

@@ -33,17 +33,12 @@ set( calamaresui_SOURCES
     widgets/LogWidget.cpp
     widgets/TranslationFix.cpp
     widgets/WaitingWidget.cpp
-    ${CMAKE_SOURCE_DIR}/3rdparty/waitingspinnerwidget.cpp
+    widgets/waitingspinnerwidget.cpp
 
     Branding.cpp
     ViewManager.cpp
 )
 
-# Don't warn about third-party sources
-mark_thirdparty_code(
-    ${CMAKE_SOURCE_DIR}/3rdparty/waitingspinnerwidget.cpp
-)
-
 if( WITH_PYTHON )
     list( APPEND calamaresui_SOURCES
         modulesystem/PythonJobModule.cpp

src/libcalamaresui/widgets/WaitingWidget.h

@@ -10,7 +10,7 @@
 #ifndef WAITINGWIDGET_H
 #define WAITINGWIDGET_H
 
-#include "3rdparty/waitingspinnerwidget.h"
+#include "widgets/waitingspinnerwidget.h"
 
 #include <chrono>
 #include <memory>

src/modules/partition/gui/ScanningDialog.cpp

@@ -10,7 +10,7 @@
 
 #include "ScanningDialog.h"
 
-#include "3rdparty/waitingspinnerwidget.h"
+#include "widgets/waitingspinnerwidget.h"
 
 #include <QBoxLayout>
 #include <QFutureWatcher>