Revert "stream_sidebar_row: Use tooltips for showing stream name on hover."
Revert "stream_sidebar_row: Use tooltips for showing stream name on hover."

This reverts commit be240c2820c5a5346e28dc9b3c1b49ab82da653f.

This commit didn't get a positive reception on chat.zulip.org.

kou/zulip,rht/zulip,hackerkid/zulip,punchagan/zulip,punchagan/zulip,punchagan/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,zulip/zulip,zulip/zulip,zulip/zulip,punchagan/zulip,kou/zulip,kou/zulip,punchagan/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,rht/zulip,punchagan/zulip,zulip/zulip,punchagan/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,andersk/zulip,rht/zulip,eeshangarg/zulip,rht/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,rht/zulip,kou/zulip,hackerkid/zulip,hackerkid/zulip,eeshangarg/zulip,rht/zulip,rht/zulip,eeshangarg/zulip,andersk/zulip,eeshangarg/zulip,kou/zulip,kou/zulip