2.10: fix issues with data-selectize dropdown in Batch Manager

[jradwan]

The new data-selectize-based dropdown on the Batch Manager page in 2.10 allows for a nicer display and also allows for the user to type in the box to search (which is helpful in large galleries with lots of albums/sub-albums). However, there are a few issues I haven't been able to figure out yet:

• the control will not default to empty, showing the placeholder text; instead it automatically selects the first album in the list

• the albums are not properly sorted; in a View Source, they are listed in the correct order in the resulting HTML, but the control is apparently sorting them by "value" instead: