Add an "Ungroup" contextual menu item for <g> elements

[ireneboschi]

Feature Description

Hi, let me start with big compliments for your project, I really loved it as soon as I opened it. I am on a quest to replace Adobe Illustrator for editing/optimizing SVGs and GodSVG stands out of the competition; the care that is put in it shows through.

Now to the request: I had troubles understanding how to ungroup <g> elements, since the contextual menu only offers duplication and deletion options. It took some time to understand that I could just drag and drop every <path> out of the <g> and lastly delete the group.
Is it possibile to directly add an "Ungroup" option on the menu? It may be useful for people like me, used to do everything through menus and written instructions, like in the old days ;)

[MewPurPur]

Thanks! I'm currently planning to rework the inspector in a way that would allow me to add more contextual actions, such as this one. I've tried this several times before and didn't manage to do it, but I'll try again for alpha 13.

This operation is something I do want to add to the <g/> element when the rework is finished.

In the meantime, you need to copy and paste every property (the code editor may be more convenient if there are many), then Shift-select all the elements and drag and drop them outside.