Updated mediawiki/extensions
Project: mediawiki/extensions/BookManagerv2  8bd6472024580df397afce49eede6d952880dbe6

Bug 51257: Improve chapter dropdown for books with many chapters.

Add scrollbar, limit height of the div

Change-Id: I1916d6d3df0b2e69b542b8e4ce4992da10c6797b