Scale groups with click&drag

[Stanzilla]

Moved from https://www.wowace.com/projects/weakauras-2/issues/827

Is your feature request related to a problem? Please describe. What i wanted that when i take someone elseses WA string and put it on my screen and that group aura (for example aura that show you lv,exp to lv and kills to lv ) looks too big on my screen i can resize it to 90%,80% or ... something like that and keep all of proportions of that aura same .And so i dont have to resize each piece of that group individually to make it work .

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Thanks to @sragia we know have a scale option. What is missing now, is a improvement to the MoverResizer. On Group selection it should really show a resizer in the corners which should be usable to change the scale.

[emptyrivers]

Changed the title, since the original ask of this ticket has been done for a while, and the only remaining thing to do is improve the mover frame.

[mrbuds]

Any idea how that corner resizer should look ?

[InfusOnWoW]

Same as currently, maybe with a additional icon that indicates it's scaling.