docs: Fix a few typos

There are small typos in:
- editor/js/defaults.js
- editor/js/defaults_mobile.js
- src/litegraph.js
- src/nodes/geometry.js
- src/nodes/gltextures.js

Fixes:
- Should read `sequentially` rather than `sequentually`.
- Should read `default` rather than `deafult`.
- Should read `visually` rather than `visualy`.
- Should read `offscreen` rather than `offscren`.
- Should read `dichotomic` rather than `dichotimic`.

Signed-off-by: Tim Gates <tim.gates@iress.com>