remove srcset

[giucu91]

Describe the bug
The Misc settings -> remove srcset seems not to work.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

• Which addons do you have installed:

• Modula PRO
• Albums
• Slider
• Lightbox Slideshow
• Password Protect
• Watermark
• Deeplink
• Right-Click Protection
• Advanced Shortcode
• SpeedUp
• Video

• Which browser is affected (or browsers):

• Chrome
• Firefox
• Safari
• Other

• Which device is affected (or devices):

• Desktop
• Tablet
• Mobile
• Other

Used versions

• WordPress version:
• Modula Lite version:
• Modula PRO version: -
• Albums version: -
• Slider version: -
• Lightbox Slideshow version: -
• Password Protect version: -
• Watermark version: -
• Deeplink version: -
• Right-Click Protection version: -
• Advanced Shortcode version: -
• SpeedUp version: -
• Video version: -

[TeoAlex]

We coudn't seem to find an existing "remove srcset" setting and i added it.