CodeEditor: Prevent suggestions from being clipped (#42120) (#42129)

Closes #40792

Co-authored-by: Josh Hunt <josh@trtr.co>
Co-authored-by: Ashley Harrison <ashley.harrison@grafana.com>
Co-authored-by: Hugo Häggmark <hugo.haggmark@gmail.com>
(cherry picked from commit e3ef82203e)

Co-authored-by: kay delaney <45561153+kaydelaney@users.noreply.github.com>

packages/grafana-ui/src/components/Monaco/CodeEditor.tsx

@@ -131,6 +131,7 @@ class UnthemedCodeEditor extends React.PureComponent<Props> {
         top: 0.5 * theme.spacing.gridSize,
         bottom: 0.5 * theme.spacing.gridSize,
       },
+      fixedOverflowWidgets: true, // Ensures suggestions menu is drawn on top
     };
 
     if (!showLineNumbers) {