fix: reuse translation from SearchResultView

小窗口界面的原对应文案已经移到了 SearchResultView，全屏位置同步更新
文案位置。

Issue: linuxdeepin/developer-center#7631
Log:

qml/FullscreenFrame.qml

@@ -443,7 +443,7 @@ Control {
                 columns: 7
                 paddingColumns: 1
                 placeholderIcon: "search_no_result"
-                placeholderText: qsTranslate("WindowedFrame", "No search results")
+                placeholderText: qsTranslate("SearchResultView", "No search results")
                 placeholderIconSize: 256
                 model: delegateSearchResultModel
                 padding: 10