- Linting (ESLint): Stricter rules (or switch to warning)

- 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

editor/locale/lang.de.js

@@ -206,7 +206,7 @@ export default {
     unsavedChanges: 'Es sind nicht-gespeicherte Änderungen vorhanden.',
     enterNewLinkURL: 'Geben Sie die neue URL ein',
     errorLoadingSVG: 'Fehler: Kann SVG-Daten nicht laden',
-    URLloadFail: 'Kann von dieser URL nicht laden',
+    URLLoadFail: 'Kann von dieser URL nicht laden',
     retrieving: "Retrieving '%s' ...",
     popupWindowBlocked: 'Popup window may be blocked by browser',
     exportNoBlur: 'Blurred elements will appear as un-blurred',