Steps to replicate the issue (include links if applicable):

• Navigate to Suggested Edits, Alt Text
• Attempt to long-press to highlight text

What happens?:
The user is unable to highlight text.

What should have happened instead?:
The user should be able to highlight and copy text to use in the alt text description.

Software version (skip for WMF-hosted wikis like Wikipedia):
Tested on 7.4.3 (54)
Other information (browser name/version, screenshots, etc.):