Fix for Bug 4945 - Patron search is limited by default to the currently logged-in...

Fix for Bug 4945 - Patron search is limited by default to the currently logged-in library

I couldn't figure out how (or whether) GetBranchesLoop could be
convinced to return a list of branches without selecting one, so
I swapped GetBranchesLoop with GetBranches. This will preselect
a branch only if a branch has been submitted as part of a query.

This does NOT preselect the correct branch when IndependantBranches
is turned on.

I also added a template variable which is true if a query has
been submitted with a branch or a category so that the extra
form fields can be displayed, reminding the user that they
added limiters to their query.

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