`loadFromString`, `loadFromDataURI` so known when ready and set
- Docs (Refactoring): Formally specify `Promise` resolve type;
add `typedef` for dialog result object; add an
`ArbitraryCallbackResult` type
- Testing (Refactoring): Abstract out to helper file functions for approving local storage and opening the main menu
- Docs (CHANGES): Update
- npm: Update devDeps; update nested deps for security audit
- Breaking internal API change: `updateGripCursor` moved to be class method of Selector rather than instance method
- Breaking internal API change: `subpathIsClosed` moved to be class method of `Path` rather than instance method
- Refactoring: Reuse utilities base64 encoder for SVG icons plugin
- Docs (JSDoc): Fix return of the `mouseUp` (can also be an object) and `mouseDown` (may also be a boolean) of `pathActions`; other JSDoc additions/improvements