Fix for Bug 4820, Alter layout of Circulation and fines rules page for clarity

Fix for Bug 4820, Alter layout of Circulation and fines rules page for clarity

I propose some changes to the issuing rules interface to improve usability:

 - Better define and delineate the sub-sections on the page:
   - Default checkout and hold policy
   - Checkout limit by patron category
   - Holds policy by item type

 - Repeat the current library name, when selected, for clarity: "Default
   checkout and hold policy for Athens" rather than "Default checkout and
   hold policy for this library"

 - Use the phrase "all libraries" when no library is selected. "Default
   library" seems ambiguous. "All libraries" better defines how the rule
   will be applied: to all libraries in the absence of a more specific rule.

 - Use the term "all" instead of "default" in cases where a rule will apply
   to all categories or item types.

Signed-off-by: Nicole Engard <nengard@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>