The "wait" message and progressbar are not shown on the plug-in settings page under certain conditions

[alexboia]

Describe the bug The "wait" message and progressbar are not shown (or partially shown) on the plug-in settings page when the resolution does not allow the entire settings form to be displayed and the user has to scroll to the "save" button.

To Reproduce Steps to reproduce the behavior:

1. Go to the plug-in settings page using a device such as a laptop computer or another device with a vertical resolution of 768px or less (or resize the browser window to fit this setup).
2. Scroll down to the "save" button and attempt to save the settings.
3. The screen is blocked by a translucent overlay, but no "wait" message or progress bar is shown.

Expected behavior The "wait" message and progress bar must be shown.

Desktop (please complete the following information):

• Vertical resolution (or browser window size) of 768px or less.

Smartphone (please complete the following information):

• Vertical resolution (or browser window size) of 768px or less.