Added support for context keyword substitutions on override paths in content panes provided by views_content.

#424548: Add a warning about overridng pager settings with Views AJAX.

- php potx-cli.php --mode=multiple
- msgcat views_content-plugins-content_types.pot views_content-plugins-views.pot views_content.pot --use-first --no-wrap -o views_content.combined.pot
- msgcat page_manager-plugins-tasks.pot page_manager-theme.pot page_manager.pot --use-first --no-wrap -o page_manager.combined.pot
- msgcat ctools.pot includes.pot plugins-access.pot plugins-arguments.pot plugins-content_types-block.pot plugins-content_types-custom.pot plugins-content_types-form.pot plugins-content_types-node.pot plugins-content_types-node_context.pot plugins-content_types-node_form.pot plugins-content_types-term_context.pot plugins-content_types-user_context.pot plugins-content_types-vocabulary_context.pot plugins-contexts.pot plugins-relationships.pot --use-first --no-wrap -o ctools.combined.pot

#427666: Provide the right theme path so Views can display the views-view.tpl.php template for the panel pane.

Implement context keywords which also use the converters. Add converters to user, fix taxonomy converters.

Remove the setting to allow Views to use the exposed form as that isnt actually implemented. Would be a nice feature though.

Fix the "save" button to work on the views content settings page, though that page is still in the wrong place.