Use ijkl-arrows rather than vim-arrows

ui/pageview.cpp

@@ -2015,7 +2015,7 @@ void PageView::keyPressEvent( QKeyEvent * e )
     // move/scroll page by using keys
     switch ( e->key() )
     {
-        case Qt::Key_J:
+        case Qt::Key_I:
         case Qt::Key_Down:
         slotScrollDown( true  /* singleStep */ );
         break;
@@ -2031,11 +2031,21 @@ void PageView::keyPressEvent( QKeyEvent * e )
 
         case Qt::Key_PageUp:
         case Qt::Key_Backspace:
-        slotScrollUp();
+            if ( e->key() == Qt::Key_Down
+                 || e->key() == Qt::Key_PageDown
+                 || e->key() == Qt::Key_K )
+            {
+                bool singleStep = e->key() == Qt::Key_Down || e->key() == Qt::Key_K;
+                slotScrollDown( singleStep );
+            }
+            else
+            {
+                bool singleStep = e->key() == Qt::Key_Up || e->key() == Qt::Key_I;
+                slotScrollUp( singleStep );
+            }
             break;
-
         case Qt::Key_Left:
-        case Qt::Key_H:
+        case Qt::Key_J:
             if ( horizontalScrollBar()->maximum() == 0 )
             {
                 //if we cannot scroll we go to the previous page vertically