v0.51.2

• addTextToEditor appends text to the end instead of the beginning
• fix "isActive()" detection to work well with splits, #2806
• fix doubling of icon tooltips, closes #2811
• allow searching within mermaid diagrams, closes #2821
• allow combining tokens in text and title/attributes, fixes #2820
• improve hiding of edit button #2787
• fix missing closing div tag in word count demo widget, closes #2829
• make sure shaca is loaded before any request