Bug 16148 - Revised layout and behavior of marc modification template management

Bug 16148 - Revised layout and behavior of marc modification template management

This patch makes changes to the layout and behavior of the marc
modification template management page to make it adhere better to common
interaction patterns in Koha.

- The initial view shows a list of templates rather than pre-selecting
  the first available template for editing.

- A toolbar has been added with a "New template" button.

- The initial view of existing templates has an actions menu containing
  menu items for 'Edit actions,' 'Duplicate,' and 'Delete.' It doesn't
  appear to be possible to edit an existing template's name.

- The "Create template" form is no longer shown all the time.
  - Clicking the "New template" toolbar button triggers a modal with the
    form for creating a template. An existing template can be chosen to
    duplicate.
  - Choosing "Duplicate" from one of the template menus triggers the
    "New template" modal and preselects the corresponding template in
    the "duplicate" <select>.

- When editing actions for a template:
  - The breadcrumbs menu now reflects that a template is being modified.
  - The template name has been added as a heading.
  - A "New action" button appears in the toolbar
  - The "Edit" and "Delete" links now have a Bootstrap button style.
  - The add/edit form is now hidden by default.
  - Clicking "New action" or "edit" shows the add or edit form.
  - Clicking "Cancel" in the add/edit form hides the form.

To test, apply the patch and clear your cache if necessary.

- Got to Tools ->  MARC modification templates
- Test the "New template" button.
  - Confirm that new template creation works.
  - Confirm that duplicating a template works.
- Test the menu items in the "Actions" menu:
  - "Duplicate" should trigger the new template modal and preselect the
    template you chose to duplicate. Confirm that the template is
    successfully duplicated.
  - "Delete" should prompt you to confirm the deletion. Test both
    cancelling and confirming this operation.
  - "Edit actions" should load the page for adding or editing actions to
    a template. Test the operations on this page: New action, edit,
    delete, changing action order.

    Note that this patch does not fix Bug 15814, so action descriptions
    must still not contain single quotes.

Signed-off-by: Filippos Kolovos <f.kolovos@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>