Merge pull request #267 from dimagi/146611-bulk-trans-newline

Add support for bulk-updating multi-line translations
Focus modal dialog input or text area on load

Small usability tweak to make keyboard shortcuts (such as CTRL+A to select all text or Escape to close) work as expected.
Merge pull request #280 from dimagi/modal-dialog-focus

Focus modal dialog input or text area on load
Merge remote-tracking branches 'origin/help-text' and 'origin/signature' into staging