Fix empty string shown if company name is empty

[gersonnoboa]

If the company name is empty in the custom locales set in the web (as is the default), then the widgets tried to get it, but as it is empty, then the fallback was the theme and the configuration. If neither of those was able to provide a non-empty value, then the idea is to use the local fallback. However, for this I was mistakenly using the value from Localizable.tr. The problem is that this method first attempts to get it again from the string provider. As we determined in the first step, this is empty. However, Localizable.tr doesn't filter empty values, as all other strings can legitimately be empty. So the method returns empty string, and this is shown on the widgets.

The solution was to create a new value in the SwiftGen stencil, which is called companyNameLocalFallbackOnly. As the name says, this variable sends the string provider as nil, thus ignoring the company name's empty value, and using the value in the Localizable.strings, or the hardcoded "Company Name" as fallback.

For now, no other string is subject to this matter where the string can come from a lot of various sources, so this approach should be sufficient. If at some point it happens that quite a lot of strings need to be fetched from various sources, what can be done is that the stencil can be changed so that instead of generating static lets, we generate static funcs, and then we can easily send the string provider as needed.

MOB-2768

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• Tests fixed, added? Unit, acceptance, snapshots?
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