add translate function to option labels
scrumdo#51_search_controls: add context to t() functions
scrumdo#51: added unit tests
scrumdo#51: coder review
scrumdo#51: global name was changed after coder review
scrumdo#51: add tabindex and accesskey to form
Tagging version 7.x-0.1.
Merge branch 'release/7.x-0.1'