Display a "X" or trash icon on the element boundary when hovering it to allow deleting the element

[leandrocp]

Currently it's possible to delete elements from the page by clicking on the element, expanding the Delete section on the right sidebar, clicking Delete, and confirming. We want to optimize this whole process since deleting elements is an operation executed very often.

The idea we want to explore is adding some icon on the boundary of the element either when you hover or select such element to have quick access to the Delete operation, eg: