Remove "Block global shortcuts" global shortcut

This shortcut did not make any sense to me, because you could block the
global shortcuts for KWin, but not re-enable them again. So once blocked,
it was blocked for ever till kwin --replace &.

This is in opposite to the commit message which introduced it
(see BUG 108961).

REVIEW: 110364

kwinbindings.cpp

@@ -164,7 +164,6 @@ DEF(I18N_NOOP("Switch to Previous Screen"),        0, slotSwitchToPrevScreen());
 a = actionCollection->addAction("Group:Miscellaneous");
 a->setText(i18n("Miscellaneous"));
 DEF(I18N_NOOP("Kill Window"),                      Qt::CTRL + Qt::ALT + Qt::Key_Escape, slotKillWindow());
-DEF(I18N_NOOP("Block Global Shortcuts"),           0, slotDisableGlobalShortcuts());
 DEF(I18N_NOOP("Suspend Compositing"),              Qt::SHIFT + Qt::ALT + Qt::Key_F12, slotToggleCompositing());
 DEF(I18N_NOOP("Invert Screen Colors"),             0, slotInvertScreen());
 

workspace.cpp

@@ -131,7 +131,6 @@ Workspace::Workspace(bool restore)
     , disable_shortcuts_keys(NULL)
     , client_keys_dialog(NULL)
     , client_keys_client(NULL)
-    , global_shortcuts_disabled(false)
     , global_shortcuts_disabled_for_client(false)
     , workspaceInit(true)
     , startup(0)
@@ -1369,39 +1368,14 @@ void Workspace::resetShowingDesktop(bool keep_hidden)
     --block_showing_desktop;
 }
 
-/**
- * Activating/deactivating this feature works like this:
- * When nothing is active, and the shortcut is pressed, global shortcuts are disabled
- *     (using global_shortcuts_disabled)
- * When a window that has disabling forced is activated, global shortcuts are disabled.
- *     (using global_shortcuts_disabled_for_client)
- * When a shortcut is pressed and global shortcuts are disabled (either by a shortcut
- * or for a client), they are enabled again.
- */
-void Workspace::slotDisableGlobalShortcuts()
-{
-    if (global_shortcuts_disabled || global_shortcuts_disabled_for_client)
-        disableGlobalShortcuts(false);
-    else
-        disableGlobalShortcuts(true);
-}
-
 static bool pending_dfc = false;
 
 void Workspace::disableGlobalShortcutsForClient(bool disable)
 {
     if (global_shortcuts_disabled_for_client == disable)
         return;
-    if (!global_shortcuts_disabled) {
-        if (disable)
-            pending_dfc = true;
-        KGlobalSettings::self()->emitChange(KGlobalSettings::BlockShortcuts, disable);
-        // KWin will get the kipc message too
-    }
-}
-
-void Workspace::disableGlobalShortcuts(bool disable)
-{
+    if (disable)
+        pending_dfc = true;
     KGlobalSettings::self()->emitChange(KGlobalSettings::BlockShortcuts, disable);
     // KWin will get the kipc message too
 }
@@ -1412,7 +1386,6 @@ void Workspace::slotBlockShortcuts(int data)
         global_shortcuts_disabled_for_client = true;
         pending_dfc = false;
     } else {
-        global_shortcuts_disabled = data;
         global_shortcuts_disabled_for_client = false;
     }
     // Update also Alt+LMB actions etc.

workspace.h

@@ -267,7 +267,6 @@ public:
     void clientShortcutUpdated(Client* c);
     bool shortcutAvailable(const KShortcut& cut, Client* ignore = NULL) const;
     bool globalShortcutsDisabled() const;
-    void disableGlobalShortcuts(bool disable);
     void disableGlobalShortcutsForClient(bool disable);
 
     void sessionSaveStarted();
@@ -358,8 +357,6 @@ public slots:
     void slotWindowToDesktopUp();
     void slotWindowToDesktopDown();
 
-    void slotDisableGlobalShortcuts();
-
     void slotSettingsChanged(int category);
 
     void reconfigure();
@@ -518,7 +515,6 @@ private:
     KActionCollection* disable_shortcuts_keys;
     ShortcutDialog* client_keys_dialog;
     Client* client_keys_client;
-    bool global_shortcuts_disabled;
     bool global_shortcuts_disabled_for_client;
 
     // Timer to collect requests for 'reconfigure'
@@ -653,7 +649,7 @@ inline bool Workspace::showingDesktop() const
 
 inline bool Workspace::globalShortcutsDisabled() const
 {
-    return global_shortcuts_disabled || global_shortcuts_disabled_for_client;
+    return global_shortcuts_disabled_for_client;
 }
 
 inline void Workspace::forceRestacking()