Remove unused strings in localization

[uiryuu]

Description:

• Removed strings like "Box", "Text Cell" which will not displayed in the UI
• Removed Chrome and Firefox in the localization
• Removed "strip" in PrefSubViewController, which will be replaced in in UI in runtime (Fix subtitles override level not localized, #4892 #4893 (comment))
• Added NSHumanReadableCopyright in InfoPlist.strings (feat: enable hebrew locale #4922 (comment))

[ShlomoCode]

• Removed Chrome and Firefox in the localization

Why actually not allow a translation of this?
As a sample, I checked the titles of the entries in Wikipedia, and I see that although most Wikipedias kept the title in English, there are many who chose to translate it (among them my language, Hebrew), for example:

• https://he.wikipedia.org/wiki/%D7%92%D7%95%D7%92%D7%9C_%D7%9B%D7%A8%D7%95%D7%9D
• https://ar.wikipedia.org/wiki/%D8%AC%D9%88%D8%AC%D9%84_%D9%83%D8%B1%D9%88%D9%85
• https://yi.wikipedia.org/wiki/%D7%92%D7%95%D7%92%D7%9C_%D7%9B%D7%A8%D7%90%D7%9D
• https://ml.wikipedia.org/wiki/%E0%B4%97%E0%B5%82%E0%B4%97%E0%B4%BF%E0%B5%BE_%E0%B4%95%E0%B5%8D%E0%B4%B0%E0%B5%8B%E0%B4%82
• https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B9%E0%B9%80%E0%B8%81%E0%B8%B4%E0%B8%A5_%E0%B9%82%E0%B8%84%E0%B8%A3%E0%B8%A1
• https://awa.wikipedia.org/wiki/%E0%A4%97%E0%A5%82%E0%A4%97%E0%A4%B2_%E0%A4%95%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%AE

Full list here: https://www.wikidata.org/wiki/Q777#sitelinks-wikipedia

[uiryuu]

@ShlomoCode Indeed. In my native language we don't translate them, so I naively thought other language would do the same. I'll revert it back.