Prerequisites

• I have searched for similar features requests in both open and closed tickets and cannot find a duplicate.
• The feature is still missing in the latest stable version of Elementor ( Elementor Pro. )

What problem is your feature request going to solve? Please describe.
Elementor Toggle Widget doesn't keep curved edge when adding background color.

(Elementor Form Widget does this fine, please use that a guide to fix Elementor Toggle Widget and any other widget that has backgrounds so they are all the consistent)

Steps To Replicate:
Add a section
Add Toggle Widget
Go to Advanced > Border
Width: 1
Border Radius: 16
Color: Choose Whatever color

Go to Style > Title > Choose background color (can be any color).
Once the background is there it completely wipes out the curve of the border

See our site here for details:
https://bit.ly/2O7pHgd

Describe the solution you'd like
Make the elementor toggle widget be able to keep a curve even when theres a background color, like the elementor form widget does.

Please see video for steps and what happens
https://www.useloom.com/share/912ef68e35a34807982a7fa5316dfb67

Describe alternatives you've considered
n/a

Additional context
n/a