CP-2383 Make cornerstone theme editor menu items to be easier to use

[deepa2083]

Revamping the cornerstone theme editor menu options so it is easier to use.
Attaching the new bundle here for testing.
This will cause test failures and I have another PR that fixes the failures

@bigcommerce/cp-dt @mcampa @bigcommerce/stencil-team @bc-ranji
New bundle here:
Cornerstone-1.9.3.zip

Testing screenshots:
Before the change (existing)

After update:

[mcampa]

Can you please add the spaces back?
no need to removed the spaces and makes the PR easier to review.

[deepa2083]

@mcampa - this id - container-border-global-color-dark has been removed. Please advice if this is ok.
looks like it is not used in code.

[mcampa]

I'm not sure if that is good or bad, that config value is used here

cornerstone/assets/scss/settings/global/container/_container.scss

Line 19 in 32575cc

$container-border-global-color-dark: stencilColor("container-border-global-color-dark");

Remember, every field removed from the schema file will prevent customers from changing the configuration value in Theme Editor.

[junedkazi]

Code looks fine to me. Can you add a changelog entry. Also I would like to see a 💚 on it before we merge this one

[bc-ranji]

💚