Do less unnecessary work!

Squished!
Give composer highest tab index on the page

Allows you to tab back to it if you click the list, or click away.

Previously you need to Shift-tab, or click.
Merge pull request #86 from jory/tabindex

Give composer highest tab index on the page
Merge pull request #83 from jory/fix-fewer-operations

Do less unnecessary work!
Add placeholder text.
Merge pull request #87 from kid-icarus/placeholder

Add placeholder text.