修复了一些不应有焦点控件按tab会获得焦点的问题

gui/page/spkpageapplist.cpp

@@ -27,6 +27,9 @@ namespace SpkUi
     mBtnGotoPage->setText(tr("Goto"));
     mBtnPgUp->setText(tr("Previous"));
     mBtnPgDown->setText(tr("Next"));
+    mBtnGotoPage->setFocusPolicy(Qt::NoFocus);
+    mBtnPgDown->setFocusPolicy(Qt::NoFocus);
+    mBtnPgUp->setFocusPolicy(Qt::NoFocus);
 
     mPageSwitchLay->addWidget(mPageIndicator);
     mPageSwitchLay->addStretch();
@@ -92,6 +95,7 @@ namespace SpkUi
       itm->deleteLater();
     }
     mAppItemList.clear();
+    mAppsArea->verticalScrollBar()->setValue(0);
   }
 
   void SpkPageAppList::ResourceAcquisitionFinished(int id, ResourceResult result)

gui/spkiconbutton.cpp

@@ -8,7 +8,7 @@
 SpkIconButton::SpkIconButton(QWidget *parent) :
   QPushButton(parent)
 {
-
+  setFocusPolicy(Qt::NoFocus);
 }
 
 void SpkIconButton::SetIcon(QIcon i, QSize s)

gui/spkmainwindow.cpp

@@ -447,8 +447,11 @@ SpkUi::SpkMainWidget::SpkMainWidget(QWidget *parent) : QFrame(parent)
   SidebarMgr->AddUnusableItem(CategoryParentItem);
   CategoryWidget->addTopLevelItem(AppDetailsItem);
   CategoryWidget->addTopLevelItem(CategoryParentItem);
+  CategoryWidget->addTopLevelItem(DownloadsItem);
   CategoryWidget->addTopLevelItem(UiTestItem);
 
+  CategoryWidget->setFocusPolicy(Qt::NoFocus);
+
   // Must be done after added into a view.
   AppDetailsItem->setHidden(true); // Hide until we actually open up a Details page
   CategoryParentItem->setExpanded(true);