- Updated anchor scroll change to open up details blocks if the target
exists within.
- Updated highlighting and animation implementation to fix hardly visible highlighting.
- Removed old, now unused, handing of CM instances in details blocks.
Related to #4637.
Adds just the part to store image data, and remove on successfull save.
Alters save events to properly throw upon error.
Adds IDB-Keyval library for local large-size store.
For #4421