Revert "Make every applet its own focus scope"

Even though this change is probably technically correct, it breaks
things in workspace which aren't really setting focus properly.

Better to revert now and merge again later when things work.

This reverts commit e65d7b98be.

src/plasmaquick/appletquickitem.cpp

@@ -403,7 +403,6 @@ AppletQuickItem::AppletQuickItem(Plasma::Applet *applet, QQuickItem *parent)
     : QQuickItem(parent),
       d(new AppletQuickItemPrivate(applet, this))
 {
-    setFlags(QQuickItem::ItemIsFocusScope);
     d->init();
 
     if (d->applet) {