Bug 10032: Improve GUI when uncertain price prevents closing the basket

Added disabled "Close this basket" button when uncertain
prices are present.
Note that whilst this has a "title" attribute, there is no tooltip
shown because JQueryUI disabled buttons don't get DOM events.

https://bugs.koha-community.org/show_bug.cgi?id=10032

Signed-off-by: Charlotte Cordwell <charlotte.cordwell123@gmail.com>

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

koha-tmpl/intranet-tmpl/prog/en/modules/acqui/basket.tt

@@ -62,6 +62,9 @@
                    [% IF ( unclosable ) %]
                     [% ELSIF ( uncertainprices ) %]
                         <div class="btn-group"><a href="/cgi-bin/koha/acqui/uncertainprice.pl?booksellerid=[% booksellerid %]&amp;owner=1" class="btn btn-default btn-sm" id="uncertpricesbutton"><i class="fa fa-usd"></i> Uncertain prices</a></div>
+                        <div class="btn-group">
+                            <a href="" class="btn btn-default btn-sm disabled" id="closebutton" title="Can not close baskets that have items with uncertain prices in them."><i class="fa fa-times-circle"></i> Close this basket</a>
+                        </div>
                     [% ELSE %]
                         <div class="btn-group">
                             <a href="/cgi-bin/koha/acqui/basket.pl?op=close&amp;basketno=[% basketno %]&amp;booksellerid=[% booksellerid %]" class="btn btn-default btn-sm" id="closebutton"><i class="fa fa-times-circle"></i> Close this basket</a>