UI buttons consistency improvement

[Geeyun-JY3]

Describe the problem

1. Translation page overview tab:
   
2. Component page and language page:
   If I don’t get it wrong, the logic is not consistent among this 4 strings.
   
   
3. Search page:
   
   

Describe the solution you'd like

1. Change “Edit” to “Translate”
2. There are two solutions:
   1. Make ① consistent with ③ (I prefer this)
   2. Make ③ consistent with ④, while ① is consistent with ②
3. All of them should be “Target strings”
   Currently, users may confuse it with a filter called “Translated strings”. They are totally different:
   

Describe alternatives you've considered

No response

Screenshots

No response

Additional context

No response

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[Geeyun-JY3]

@nijel Why this column of search page is still called Translated string? This is inconsistent.