[web] Remove transform from messageTooltipIcon

Summary:
For long text messages (taking whole width allowed) reply and create sidebar tooltip icons were displayed in the same place, overlapping. This diff fixes the issue

Initial issue was fixed in D867, this diff removes transform from messageTooltipIcon

Test Plan: Check various scenarios with one or two tooltips for different messages and make sure they are displayed correctly each time

Reviewers: palys-swm, ashoat

Reviewed By: palys-swm, ashoat

Subscribers: ashoat, zrebcu411, Adrian, atul, subnub

Differential Revision: https://phabricator.ashoat.com/D850