feat(windows): Consider how we can handle font and dialog size for localization

[mcdurdin]

• Window size and font size is huge constraint in localization. I can see some codes in locale_en.xml to adjust the window size. I am sure if we can use this as customization while localization.

• Ability to change font size and window size is needed while localization. Split out deployment of localization by language so we can deploy font files with the localization file.

Originally posted by @mcdurdin in https://github.com/keymanapp/keyman/issues/1200#issuecomment-665379240

[mcdurdin]

See also #1199

[mcdurdin]

Pros and cons:

1. Dialog size is a problem. The sizes specified in the existing locale.xml translations have diverged from the latest work in the English locale.xml. So maintenance is already tricky.

2. Font size needs to be specified as a factor of the user's preferred system font size. We need to do some additional work here to make Keyman work better with the user's font size anyway.

Given these two factors, I am going to postpone support for these two features. Having stable localization infrastructure (using Crowdin) is a significant benefit and this functionality can be assessed again at a later date.