Add a 'full' view mode and use it for file/%file pages

Joining the Media party for a while and I'm taking this issue as my first 'victim' :)

Cross linking #1051090: Revamp file view modes: migrate media_small to teaser, media_large to full, media_preview to preview; deprecate link & original for anyone interested, but that one's gonna be a bit harder, since it will need to retain, but deprecate, existing view modes in addition to adding new ones.

Initial patch that does only what's mentioned in the OP.

Should we also change the 'default' view mode throught the module with the new 'full' view mode in this issue/patch?

Updates some functions to default the $view_mode parameter to 'full', and removes the stray reference to 'media_preview'.

Heh, that's what I was talking about in #4.

Heh, that's what I was talking about in #4.

Yep. You were right, which prompted Dave and me to look more into it. Thanks for catching that.

+++ b/file_entity.pages.inc
@@ -38,9 +38,6 @@ function file_entity_edit($form, $form_state, $file) {
-  $form['preview'] = file_view_file($file, 'media_preview');
-  $form['preview']['#weight'] = -10;
-

No need to remove the preview entirely. We can output a link to the file. Media can then alter this into file_view_file($file, 'media_preview'). This patch fixes that.

Follow-up: #1296268: Add Preview and Teaser view modes

The 'custom settings' property of this view mode was set to FALSE, meaning that the view mode can't be configured. Was this intentional? If so, why? It seems that as a result the view mode is not used at file/%file and default is used instead, presumably because of the test for 'custom settings' in file_displays(). Should 'custom settings' be set to TRUE instead?

Updates needed for each media provider module. Initial issues posted for media_youtube and media_vimeo.