Dev lasso board utilities

[mlr77]

Added some utilities to the lasso selection to align apps or group assign certain features like a specific color for a stickie or a specific kernel for a group of SAGECells. Most of the functions are written in typescript as an array of updates but these would all be ideal for batch updates. Needs work to rewrite as batchUpdates.

The board.py was adjusted slightly to allow for organizing selected apps as a proof of concept. We can add more "smart functions" as needed.

[renambot]

• Nice first pass @mlr77 !
• Maybe eslint is not loaded in your editor, but a few red marks in my editor (mostly fixed now): const, unused import or variables, any, ...
• Check the browser console: big error messages
• Before finishing the PR, maybe create a type for your updates instead of using 'any'.
• thanks