Fix the style jitter issue

[l123wx]

Fix the style jitter issue when linking line

And make the prompt more prominent when the Field is selected

Before

https://github.com/drawdb-io/drawdb/assets/48666585/2f4a1a01-905e-47ba-952f-9cabcc198f89

After

https://github.com/drawdb-io/drawdb/assets/48666585/485207fb-d9b6-49f3-b8a7-e8b8d7424490

[vercel[bot]]

@l123wx is attempting to deploy a commit to the dottle's projects Team on Vercel.

A member of the Team first needs to authorize it.

[1ilit]

I'm closing this since it was addressed in PR #148