Several bug fixes and improvements to LI table and DF application.

Several bug fixes and improvements to LI table and DF application.

- The "release" button was removed from the DF application controls.
- The "save changes" button was moved in from the right edge of the screen.
- "Save changes" behaves better (doesn't reveal a dead progress bar) when
    there are no changes to save.
- Distribution formula application controls and labels disappear properly
    from the LI table's copy editor if there are none in the system.
- There is no more error about "li.id is not a function."
- There is a "reset formulas" button in the DF application controls now that
    reverts all copy values to whatever they were before any DF were
    applied (within a single editing session).
- When multiple DF are applied, they are applied "serially" with regards to
    copies, not "in parallel" (i.e., from the end of the last application,
    not from position zero).

git-svn-id: svn://svn.open-ils.org/ILS/trunk@15486 dcc99617-32d9-48b4-a31d-7c20da2025e4