Highlight text after adding card

After adding a card to the main or side, the search text will become
selected to easily start the next search

cockatrice/src/tab_deck_editor.cpp

@@ -606,6 +606,7 @@ void TabDeckEditor::addCardHelper(QString zoneName)
     recursiveExpand(newCardIndex);
     deckView->setCurrentIndex(newCardIndex);
     setModified(true);
+    searchEdit->setSelection(0, searchEdit->text().length());
 }
 
 void TabDeckEditor::actSwapCard()