Bug 10240 QA follow-up

Address the following issues:
    1/ Address minor qa issues with the templates:
     FAIL    koha-tmpl/intranet-tmpl/prog/en/modules/circ/offline-mf.tt
      FAIL      forbidden patterns
                forbidden pattern: intranet-tmpl should certainly
                replaced with [% interface %] (line 24)
                [etc.]
     OK      tt_valid
     OK      valid_template

    FAIL    koha-tmpl/intranet-tmpl/prog/en/modules/circ/offline.tt
     FAIL      forbidden patterns
               forbidden pattern: intranet-tmpl should certainly
               replaced with [% interface %] (line 509)
               [etc.]
    FAIL      tt_valid
        lines 5, 5
    2/ Run perltidy on new scripts
    3/ download.pl returns data.finished = 1 if number of returned
       data < 5000 (avoids 1 ajax call)
    4/ Replace qq{} around sql queries with q{}

Also, a race condition existed that resulted in pending transactions
only getting deleted from the local database in certain circumstances
(fast connections under Chrome, mostly). This patch fixes that so that
successfully-uploaded transactions are always deleted.

Finally, this patch adds a link to the Pending offline operations page
on the synchronize page for easier navigation.