fix: label for read-only dates

[madbob]

Totally unrequested graphical fix for read only date properties.

[hamza221]

LGTM but iirc this was added for a certain edge case by @GVodyanov or am I mistaken ?

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/components/Properties/PropertyDateTime.vue	0.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

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