console: re-enable debug console option

Keep console option hidden by default, but add using CLEMENTINE_DEBUG_CONSOLE
env variable:
CLEMENTINE_DEBUG_CONSOLE=1 clementine

src/ui/mainwindow.cpp

@@ -154,6 +154,7 @@ void qt_mac_set_dock_menu(QMenu*);
 
 const char* MainWindow::kSettingsGroup = "MainWindow";
 const char* MainWindow::kAllFilesFilterSpec = QT_TR_NOOP("All Files (*)");
+const char* MainWindow::kShowDebugConsoleKey = "CLEMENTINE_DEBUG_CONSOLE";
 
 namespace {
 const int kTrackSliderUpdateTimeMs = 500;
@@ -919,8 +920,12 @@ MainWindow::MainWindow(Application* app, SystemTrayIcon* tray_icon, OSD* osd,
           SLOT(EnableKittens(bool)));
   connect(ui_->action_kittens, SIGNAL(toggled(bool)), app_->network_remote(),
           SLOT(EnableKittens(bool)));
-  // Hide the console
-  // connect(ui_->action_console, SIGNAL(triggered()), SLOT(ShowConsole()));
+  QString showConsole =
+      QProcessEnvironment::systemEnvironment().value(kShowDebugConsoleKey, "0");
+  if (showConsole == "1")
+    connect(ui_->action_console, SIGNAL(triggered()), SLOT(ShowConsole()));
+  else
+    ui_->action_console->setVisible(false);
   NowPlayingWidgetPositionChanged(ui_->now_playing->show_above_status_bar());
 
   // Load theme

src/ui/mainwindow.h

@@ -97,6 +97,7 @@ class MainWindow : public QMainWindow, public PlatformInterface {
 
   static const char* kSettingsGroup;
   static const char* kAllFilesFilterSpec;
+  static const char* kShowDebugConsoleKey;
 
   // Don't change the values
   enum StartupBehaviour {

src/ui/mainwindow.ui

@@ -536,6 +536,7 @@
     <addaction name="action_hypnotoad"/>
     <addaction name="action_enterprise"/>
     <addaction name="action_kittens"/>
+    <addaction name="action_console"/>
     <addaction name="separator"/>
    </widget>
    <widget class="QMenu" name="menu_tools">