Improve editor property capitalization

Created by: Calinou

An hardcoded list of exceptions is now used to make property name capitalization more natural.

I'm not too happy with this implementation – maybe we should add an optional "friendly name" property hint in the end. Also, it takes more time to run the string replacements (30 µs on average for each string in a debug build, compared to 10 µs with the old method). Still, it's not run every frame so it should be fine performance-wise.

There are other improvements we can do, such as not capitalizing stop words like at, in and to. We could do this for the general-purpose String::capitalize() function in 4.0.

Preview

Look at the section and property names.