Add the capability to search for text with in a flow's objects.
- New menu items / shortcuts for find/next/previous.
- Display a find dialog inspired by the VS Code finder
- Shows total result count and current result index
- Arrows to move back and forth between items in the result set
- Zoom the camera to the currently selected item in the result set

Address these two items:

- Uncomment keyboard short cuts for find next and find previous
- Typing enter in the search box moves to next result (and shift+enter moves to previous)