lsp gotosymboldialog: Set placeholder text for line edit

Signed-off-by: Waqar Ahmed <waqar.17a@gmail.com>
(cherry picked from commit 31f0e286)

addons/lspclient/gotosymboldialog.cpp

@@ -6,6 +6,7 @@
 #include "gotosymboldialog.h"
 #include "lspclientserver.h"
 
+#include <KLocalizedString>
 #include <KSyntaxHighlighting/Theme>
 #include <KTextEditor/ConfigInterface>
 #include <KTextEditor/Editor>
@@ -180,6 +181,8 @@ GotoSymbolHUDDialog::GotoSymbolHUDDialog(KTextEditor::MainWindow *mainWindow, QS
 {
     setPaletteToEditorColors();
 
+    m_lineEdit.setPlaceholderText(i18n("Type to filter through symbols in your project..."));
+
     m_treeView.setModel(model);
     auto delegate = new GotoSymbolHUDStyleDelegate(this);
     delegate->setColors();