Link Tooltip in Comment is not Visible When The Link is on the First Line.

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Description of the issue

When you're editing a comment and there's a link on the first line, the tooltip, which appears when you move the mouse over the link, is not visible. Only part of the tooltip is visible and the text of tooltip is impossible to read.

Context information (for bug reports)

Output of bench version

erpnext 15.5.0
frappe 15.4.1
hrms 15.5.0
insights 1.1.3
payments 0.0.1
wiki 2.0.0

Steps to reproduce the issue

1. Start writing a comment and paste a link on the first line of the comment
2. Press enter so that the link would get formatted
3. Move the mouse over the link

Observed result

Most of tooltip is not visible

Expected result

Tooltip is completely visible

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@ankush would it be fair to reopen this issue, given that the fix was reverted?