We reduced the width of "Actions" column too much in stream subscribers
and group members list when there were no users matching the text in
search input and it did not look good because of "Actions" heading
being shifted to extreme right.
This commit fixes it by removing the "actions" class on the heading,
which was used to set the width to "1%" which is needed for tables
with only icons in buttons to avoid unused space but not here.
As a result of removing this class, the CSS of "min-width: 100px"
is being applied to the column, but that's fine atleast for stream
subscribers list as it did not look good before due to scrollbar
overlapping the buttons and it looks better now.
For the group members list, we set min-width to 80px, as we do
not require 100px width and it is enough to avoid overlapping
scrollbars to an extent.
The overlapping scrollbars problem is still not fixed completely
but that will handled in a separate commit. This commit was
just to make the heading row look better when there are no users
in the list.