Resize room list scroll section.
Resize room list scroll section.

This fix isn't perfect. Currently the scroll view is
slightly smaller than the list of rooms. I think it has something
to do with the how the heigh is calculate in js, considering it has
some assumptions about the height of each bar and the padding. However
room items are the only things which change with respect to the root
value. Therefore the item list is actually taller than the computed
pixel value of the list converted to rems.

I'll look into it.

matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk