Core: Initialize members in IMode, clean up code a bit

Change-Id: I2cef9e0eb9c68efae4ca84d487f5a08675874efd
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/imode.cpp

@@ -26,15 +26,12 @@
 #include "imode.h"
 
 using namespace Core;
-IMode::IMode(QObject *parent)
-    : IContext(parent),
-    m_isEnabled(true)
+IMode::IMode(QObject *parent) : IContext(parent)
 {
 }
 
 IMode::~IMode()
 {
-    if (m_menu)
     delete m_menu;
 }
 

src/plugins/coreplugin/imode.h

@@ -63,9 +63,9 @@ private:
     QString m_displayName;
     QIcon m_icon;
     QMenu *m_menu = nullptr;
-    int m_priority;
+    int m_priority = -1;
     Id m_id;
-    bool m_isEnabled;
+    bool m_isEnabled = true;
 };
 
 } // namespace Core