Paste option expansions

[Landy005]

Here are some ideas to expand the transformation settings;

• Hologram inside preview box
  Preview showing as a visible hologram of the blocks you're going to paste.

• Mirror Y & Rotate X, Y are missing
  Why are the remaining axis missing from these? Can every mirroring and rotation option be created with a combination of these 3?
  IF SO; it might still be handy to have all 3 to avoid headaches to figure out, for instance, how to have a a rotated upside down house,
  especially without the hologram showing the blocks outcome right now.

• Resize
  Resizing up (or down if possible) by x times.

• Rotate diagonally/ any angle.
  Rotate around non-straight angles, FAWE supports this so I figured why not for the editor.

• A pivot alongside the current arrow keys
  Just like the selection box, have the paste preview box have a pivot alongside the arrow keys, seems more practical than to play around
  with the keys.

-Ability to preserve (toggle, or flag) biomes when copy pasting.

Right now when you copy paste, it adapts to the biome it's pasted in;

(Selection on the left, paste on the right, in a different biome)

• Ability to (not) preserve (toggle, or flag) entities & blocks,
  Perhaps have the air and water blocks as a standard toggle and other blocks as masks.
  a great example is Fawe, where they use flags and masks.
  
  

The gmask/mask features are gamechangers and bringing the possibility of masks based on variables like angles or patterns to the editor (even through scripting) would be awesome!