make click to insert nick work on join/parts, /me's etc

[matrixbot]

Created by @ matthew:matrix.org.

[t3chguy]

already is for /me's

[t3chguy]

this is actually somewhat painful and will require re-translation due to it being shifted to to tJsx

[t3chguy]

PR Reverted due to it needing larger refactor to react-sdk codebase due to most things assuming only Text (not <a />s) are returned