fix: Fixed issue with placeholder connection being removed too early

[bmingles]

Placeholder urls were being removed before real connection was ready resulting in connections temporarily disappearing from the UI. This should fix that.

DH-18119

[github-actions]

End-to-end Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
6	6	0	0	0	0	0	04:54:10

A ctrf plugin

Detailed Test Results

Name	Status	ms	Flaky 🍂
should default to the correct settings	passed ✅	1791
should return custom settings: Empty configs	passed ✅	274
should return custom settings: Populated configs	passed ✅	108
should be able to load VSCode	passed ✅	1133
should only be visible when a supported file type is active: test.groovy	passed ✅	2746
should only be visible when a supported file type is active: test.py	passed ✅	1013

A ctrf plugin

Failed Test Summary

No failed tests ✨

Flaky Test Summary

No flaky tests detected. ✨