Test: Keyboard navigation in trees

[joaomoreno]

Tests #64233, #64231

• macOS @sandy081
• linux @roblourens
• windows @alexandrudima

Complexity: 3

New trees now support fancy keyboard navigation. These include Explorer, Search, all Debug trees, Problems.

As you start typing when focused on the Explorer you should get a type label widget appearing in the top-right corner of the Explorer. This tracks the text you type which is matched against all known files and folders (this does not recurse into folders which were never expanded, there's a separate issue tracking that).

There are three different behaviours:

• Highlight: as you type, the matching items should be rendered with highlights and keyboard arrow navigation should navigate only through those elements (Up, Down).
• Filter: as you type, the non-matching items get filtered out of view.
• Simple: this is the native File Explorer keyboard navigation experience; typing the first few characters of a file name will make focus jump there.

You can change between Highlight and Filter in the widget using the mouse (keyboard is #66899). You can also clear the whole type filter widget using the mouse or Escape.

You can change the default behaviour for all trees using the workbench.list.keyboardNavigation setting.

Known Issues:

• List: Keyboard navigation should always work in simple, for now #67279
• Tree: Use HighlightLabel in all filterable trees #67280
• NPE while changing tree children when filter is active #67233

[dbaeumer]

Closing