User story
As an Anki user,
I'd like to be able to define the specific editor toolbar position where the codeButton should appear
so that I can place the codeButton in a place that is convenient for me.
Scenario 1
If I specify a preferred position, the codeButton should appear in the position specified.
Scenario 2 (default behavior)
If I do not specify a preferred position, the codeButton should appear after (to the right of) the bold, italic, and underline buttons.
Additional information
Current behavior is that the button is appended to the existing buttons—that is, placed at the end.