Add -Wshadow and solve warnings

build_scripts/qt/compilers/clang-msvc.pri

@@ -7,3 +7,5 @@ include(common-msvc.pri)
 
 #clang-msvc does not enable the c++17 flag with qmake's c++1z flag.
 QMAKE_CXXFLAGS += /std:c++17
+
+QMAKE_CXXFLAGS += -Xclang -Wshadow

build_scripts/qt/compilers/clang.pri

@@ -1,3 +1,5 @@
 QMAKE_CXXFLAGS += -Werror
 #All includes from the third-party directory will not warn.
 QMAKE_CXXFLAGS += --system-header-prefix=third-party
+
+QMAKE_CXXFLAGS += -Wshadow

build_scripts/qt/compilers/gcc.pri

@@ -1,3 +1,6 @@
 #g++-7 is needed for C++17 features. travis does not supply this by default.
 QMAKE_CXX = g++-7
+
 QMAKE_CXXFLAGS += -Werror
+
+QMAKE_CXXFLAGS += -Wshadow

src/tabcontrollers/UtilitiesTabController.cpp

@@ -64,8 +64,8 @@ void UtilitiesTabController::initStage1()
 void UtilitiesTabController::initStage2( OverlayController* var_parent,
                                          QQuickWindow* var_widget )
 {
-    this->parent = var_parent;
-    this->widget = var_widget;
+    this->m_parent = var_parent;
+    this->m_widget = var_widget;
 }
 
 void UtilitiesTabController::sendKeyboardInput( QString input )
@@ -467,7 +467,7 @@ void UtilitiesTabController::eventLoopTick()
                         }
                         */
                         auto nError = vrnotification->CreateNotification(
-                            parent->overlayHandle(),
+                            m_parent->overlayHandle(),
                             666,
                             vr::EVRNotificationType_Transient,
                             alarmMessageBuffer,

src/tabcontrollers/UtilitiesTabController.h

@@ -33,8 +33,8 @@ class UtilitiesTabController : public QObject
             setSteamDesktopOverlayWidth NOTIFY steamDesktopOverlayWidthChanged )
 
 private:
-    OverlayController* parent;
-    QQuickWindow* widget;
+    OverlayController* m_parent;
+    QQuickWindow* m_widget;
 
     unsigned settingsUpdateCounter = 0;