Avoid double escaping in error view title

Summary: Searched for `AphrontErrorView` and then for `setTitle()`.

Test Plan: None.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2432

Differential Revision: https://secure.phabricator.com/D4880
Convert AphrontDialogView to safe HTML

Summary:
Done by searching for `AphrontDialogView` and then `appendChild()`.

Also added some `pht()`.

Test Plan: None.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4882
Convert AphrontTableView to safe HTML

Summary:
Lots of killed `phutil_escape_html()`.

Done by searching for `AphrontTableView` and then `$rows` (usually) backwards.

Test Plan:
Looked at homepage.

  echo id(new AphrontTableView(array(array('<'))))->render();

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4884