While "Menu/Theme locations" was descriptive of what the choices listed were, in the context of editing an individual nav menu it is more descriptive to use a setting label that tells you what it is you are affecting for that nav menu, which is where it will be displayed. Technically multiple locations can be chosen, but in practice that appears to be rare enough that we can avoid an awkward "location(s)" type string.
props Fencer04 for the initial patch.
fixes#38525.
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Introduces some consistency in the usage of the button CSS classes, fixes the
focus style for accessibility and responsiveness of the buttons.
- Adds the `button` class to all primary buttons make them responsive
- Removes all `secondary-button` classes and replaces it with button when needed. `button-secondary` shouldn't be used and exists just for backward compatibility reasons
- Replaces classes inside `submit_button()` with a shorthand for some buttons, and use an empty string for the default `button` class. Passing `button` is unnecessary
- Adjusts `get_submit_button()` to remove empty items
Props iseulde, dimchik, chris_d2d, mhowell, afercia.
Fixes#27314, #37138, #37448.
Built from https://develop.svn.wordpress.org/trunk@38672
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