Fix: my_node_name insert inside [global] section, add button tooltips in channellist

tools/chatgui/src/settingsdialog.cpp

@@ -147,9 +147,8 @@ void SettingsDialog::onSave() {
         if (lines[i].trimmed().startsWith("my_node_name=")) {
             lines[i] = "my_node_name=" + newName;
             found = true;
-        } else if (!found && lines[i].trimmed().startsWith("[gui]")) {
-            // insert before [gui] if not found yet
-            lines.insert(i, "my_node_name=" + newName);
+        } else if (!found && lines[i].trimmed() == "[global]") {
+            lines.insert(i + 1, "my_node_name=" + newName);
             found = true;
         }
     }