Fix container class used in bookings list and item list (read comment)

[JQChong]

With the container class attached, the page cannot scroll down further when the number of rows included in the table increases from 10 to 25, say.

[JQChong]

I will not be closing this issue, but this bug cannot be fixed completely. If overflow-y: scroll property is used, a second scroll bar is introduced immediately without anyway to hide it, at least to my knowledge. Otherwise, part of the background will disappear if the page length changes and the page is scrolled to the bottom. A very sly way to handle this is to introduce a design at the top of the page so that it does not look unnatural when the page length changes, though I am not sure if the page will still look ok.

The current bug is caused by the usage of overflow: hidden, and I certainly did not expect this to be a rabbit hole on css.