Bug 34452: Restore fund label and 'Update adjustments' button

Bug 34452: Restore fund label and 'Update adjustments' button

This patch fixed 2 small and recent regressions:

* The "Update adjustments" button used to always display. It's
  required to save a new first adjustment, but also to save
  changes to existing adjustments edited inline. It now would
  only display after "Add adjustments" was clicked. We retore
  to display it always. (bug 32746)

* We have several "Fund" pull downs on this page, but they are
  for different things and require different labelling.
  "Fund" was changed to "Shipping fund" which matches at the top,
  but doesn't work for the adjustments table and single adjustment
  form. Now we use "Shipping fund" "Fund" and no label in the table
  as the table header covers it there. (bug 33721)

To test.
  * Add a vendor
  * Receive shipment
  * Add invoice and save
  * Click on "Finish receiving"
  * Verify the button "Update adjustments" appears after clicking
    "Add new adjustment"
  * Verify the button is gone after you clicked it and the table shows
  * Change something in the table - no button to save change :(
  * Apply patch
  * Repeat steps, button "Update adjustments" should not always be
    visible.

Signed-off-by: Sam Lau <samalau@gmail.com>
Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 72ef65edbe3413027fb877e37929e98cf7fd26fe)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>