Specify firstHeading rule for .mw-special-Notifications only
Specify firstHeading rule for .mw-special-Notifications only

The rule to make the firstHeading limited in height should only
apply to the design of the Special:Notifications page, and not
everywhere on MW.

Bug: T111628
Change-Id: I6636ed7f4ad0ccc7bbf83ace51dda62d09e09a5c

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo