Fix: Clicking outside of article text area closes the article

[math-GH]

Before:
If Clicking outside of article text area closes the article in Reading config is enabled, then.....

if the user clicks in the article footer on a white space, then the article will be closed

After:
A click on the footer does not close the article.

Changes proposed in this pull request:

• if click on the footer: do nothing

How to test the feature manually:
Clicking outside of article text area closes the article is enabled:

1. click left or right hand side of the article: article will be closed
2. click on a white space in the footer: article will NOT be closed
3. click on My labels or tags or Share: dropdown will be opened and the article will NOT be closed

Clicking outside of article text area closes the article is disabled:

1. click left or right hand side of the article: article will NOT be closed
2. click on a white space in the footer: article will NOT be closed
3. click on My labels or tags or Share: dropdown will be opened and the article will NOT be closed

Pull request checklist:

• clear commit messages
• code manually tested