Make Position2D components editable in selection panel

[grtlr]

Related

• Part of Dynamic configuration of graph layout forces through blueprints #8299

What

This adds a simple single line edit for position 2D. There is no speed_fn because I think in most applications UI coordinates are probably good unit (for example in graphs).

Screen.Recording.2024-12-09.at.10.14.30.mov

[github-actions]

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Result	Commit	Link
✅	2630bf1	https://rerun.io/viewer/pr/8357

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[Wumpf]

those brackets are a bit of a stylistic break. Which I don't actually mind, but this should be integrated & aligned with https://github.com/rerun-io/rerun/blob/main/crates/viewer/re_component_ui/src/datatype_uis/vec.rs

I.e. that file should be extended with vec2 and then used instead

[Wumpf]

oh interesting, so actually it preserves the style of non-editable better than what's there in vec.rs
It's just that for edit boxes we so far didn't want to spend so much horiztonal space 🤔

[Wumpf]

oops sorry mouse slipped and clicked the wrong button

[Wumpf]

looking good, thanks for unifying things! :)