Okay isaac
This is my findings.
At first reading I felt this was not the case because I have never entered a value for the hop to popup menu width.
Well I revisited the setting.
Selected the field and found the cursor not completely left justified.
So a non visible character was inserted in the field.
Once I deleted the entry in the field and saved it .
The hop to menu re-appeared in the bottom
In fact I had two sites with the same issue.
In which I never added a value to that field in either site So I assumed it was changed in the 7.7.4 release.
Because it was there prior to the upgrade to 7.7.4
I am not sure what character was inserted because it was not visible and now deleted.
Nor do I know how it got inserted to begin with.
But it does work correctly as designed now once it was deleted on both sites.