Remove tabindex from list in SelectWorkspaceDialog

Keyboard navigation for the list items themselves has been improved.
This CL makes the list itself not focusable via tab, since up/down-
cursor would scroll the whole list which is confusing, since up/down-
cursor already scrolls the list and selects the prev./next item when
an item is in focus.

Bug: 410714934
Change-Id: I559eb656205198ca31d4a5faaaf74a1df093892e
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6459607
Commit-Queue: Wolfgang Beyer <[email protected]>
Reviewed-by: Samiya Caur <[email protected]>

Author: wolfib

front_end/panels/ai_assistance/SelectWorkspaceDialog.ts

@@ -119,7 +119,7 @@ export class SelectWorkspaceDialog extends UI.Widget.VBox {
             ` : nothing}
           </div>
           ${hasFolders ? html`
-            <ul role="listbox" aria-label=${lockedString(UIStringsNotTranslate.selectFolder)} tabindex="0"
+            <ul role="listbox" aria-label=${lockedString(UIStringsNotTranslate.selectFolder)}
               aria-activedescendant=${input.folders.length > 0 ? `option-${input.selectedIndex}` : ''}>
               ${input.folders.map((folder, index) => {
                 const optionId = `option-${index}`;