Enable -DQT_NO_URL_CAST_FROM_STRING and fix compilation

CMakeLists.txt

@@ -48,7 +48,7 @@ if(NOT CMAKE_VERSION VERSION_LESS "3.10.0")
 endif()
 
 set(CMAKE_CXX_STANDARD 17)
-add_definitions(-DQT_NO_SIGNALS_SLOTS_KEYWORDS)
+add_definitions(-DQT_NO_SIGNALS_SLOTS_KEYWORDS -DQT_NO_URL_CAST_FROM_STRING)
 
 configure_file(DiscoverVersion.h.in DiscoverVersion.h)
 

libdiscover/resources/ResourcesModel.cpp

@@ -421,5 +421,5 @@ QString ResourcesModel::applicationSourceName() const
 
 QUrl ResourcesModel::distroBugReportUrl()
 {
-    return KOSRelease().bugReportUrl();
+    return QUrl(KOSRelease().bugReportUrl());
 }