Saves cursor position when relationship element is added to richText

Editor assessment

The subject captures a precise editing behavior: the cursor position is saved when a relationship element is added inside rich text. That is concrete, understandable, and clearly a feature of the authoring experience rather than noise. The feat type matches, and scope absence is tolerable because the components are named. No body explains why the position mattered or what jumped before, which would have been a welcome detail, but the change is coherent standalone and small. Style is clean — no trailing period, no ticket junk, no footers needed. Good and publishable.