LSP: fix outline's selected item when writing

When receiving textDocument/documentSymbol or
textDocument/symbolInformation, the outline widget and the outline
combobox is cleared and updated with received symbols.
This causes the selected index to become the first item of the list when
writing text.

Fix the issue by updating the selected index after having updated the
outline widget and outline combobox.

Change-Id: I52541940f8a979cbf130da4383db48c470fc94e1
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/languageclient/languageclientoutline.cpp

@@ -187,6 +187,9 @@ void LanguageClientOutlineWidget::handleResponse(const DocumentUri &uri,
         m_model.setInfo(Utils::get<QList<DocumentSymbol>>(result));
     else
         m_model.clear();
+
+    // The list has changed, update the current items
+    updateSelectionInTree(m_editor->textCursor());
 }
 
 void LanguageClientOutlineWidget::updateTextCursor(const QModelIndex &proxyIndex)
@@ -313,6 +316,9 @@ void OutlineComboBox::updateModel(const DocumentUri &resultUri, const DocumentSy
         m_model.setInfo(Utils::get<QList<DocumentSymbol>>(result));
     else
         m_model.clear();
+
+    // The list has changed, update the current item
+    updateEntry();
 }
 
 void OutlineComboBox::updateEntry()