When Esc is pressed, clear the selection and cancel the keyboard search

This patch restores the Dolphin 1.x behaviour that Esc clears the
selection (Dolphin 2.0 did not have an easy way to clear the selection
using the keyboard so far). Moreover, Esc now also cancels the current
keyboard search. This fixes the problem that the only way to cancel the
search is to wait until the timeout has expired.

BUG: 298742
CCBUG: 297458
FIXED-IN: 4.8.3

dolphin/src/kitemviews/kitemlistcontroller.cpp

@@ -358,6 +358,13 @@ bool KItemListController::keyPressEvent(QKeyEvent* event)
         break;
     }
 
+    case Qt::Key_Escape:
+        if (m_selectionBehavior != SingleSelection) {
+            m_selectionManager->clearSelection();
+        }
+        m_keyboardManager->cancelSearch();
+        break;
+
     default:
         m_keyboardManager->addKeys(event->text());
         return false;

dolphin/src/kitemviews/kitemlistkeyboardsearchmanager.cpp

@@ -25,8 +25,6 @@
 #include <QApplication>
 #include <QElapsedTimer>
 
-#include <KDebug>
-
 KItemListKeyboardSearchManager::KItemListKeyboardSearchManager(QObject* parent) :
     QObject(parent),
     m_timeout(1000)
@@ -76,3 +74,7 @@ qint64 KItemListKeyboardSearchManager::timeout() const
     return m_timeout;
 }
 
+void KItemListKeyboardSearchManager::cancelSearch()
+{
+    m_searchedString.clear();
+}

dolphin/src/kitemviews/kitemlistkeyboardsearchmanager_p.h

@@ -58,6 +58,8 @@ public:
     void setTimeout(qint64 milliseconds);
     qint64 timeout() const;
 
+    void cancelSearch();
+
 signals:
     /**
      * Is emitted if the current item should be changed corresponding