Prevent issue form labels from appearing on a new line after their re…

…spective input

Summary:
Ref T3683

Just a visual bug I came across while fixing something else. I'm not sure why this
CSS is in khan-exercises, when the issue form is only defined in webapp as far as
I can tell?

{F119454}

{F119455}

Test Plan:
. I'm doing all my testing in webapp, since the issue form doesn't appear in khan-exercises (?)
. http://localhost:8080/mission/cc-third-grade-math/task/6265360852451328
. Click "Report a mistake in this question"
. See the labels are on the same line as the radio buttons

Reviewers: aria, john

Reviewed By: john

Subscribers: #a11y

Projects: #khan-exercises

Maniphest Tasks: T3683

Differential Revision: https://phabricator.khanacademy.org/D16882

css/khan-exercise.css

@@ -340,7 +340,6 @@ body.debug .graphie { outline: 1px dashed #fdd; }
 
 #issue #issue-status.error { font-weight: bold; color: #A21; font-size: 1.2em; }
 #issue-link { font-style: italic; }
-#issue .issue-form label { display: block; }
 #issue .issue-form input[type=text] { display: block; width: 98%; }
 #issue .issue-form textarea { display: block; width: 98%; height: 100px; }
 #issue-cancel { float: right; }