Make the Namespace-Dropdown wider

[fsedarkalex]

This is just a small cosmetic request:

Could you please make the Namespace-Dropdown wider? I am using a CI-Integration which is creating namespaces like this: production-1234-project-name-here This causes nearly all of my namespaces to take two lines in the dropdown.

[dominch]

+1 I hit this issue too, also dropdown menu size is changed on choice and font inside is different same on namespaces names

[eljoth]

+1 working with longer namespace names is awkward

[dkapanidis]

I'm adding here another request I received which is related with the dropdown:

Add more contrast to the highlighted cluster/namespace selection in the dropdown. It's hard to see which one is highlighted;