Check out a correct translation items of 'Recent activity' page

Pre-condition:
1. User should be logged
2. At least one branch should be created
3. User should have VIEW_TOPICS permission

Translation:
1. The name of 'Recent activity' page
English: "Recent activity"
Russian: "Новые сообщения"
Ukrainian: "Нові повідомлення"

2. "Mark all topics read" link
English: "Mark all topics read"
Russian: "Отметить все темы как прочтенные"
Ukrainian: "Позначити усі теми як прочитані"

3. "Topic" column
English: "Topic"
Russian: "Тема"
Ukrainian: "Тема"

4. "Last message" column
English: "Last message"
Russian: "Последнее сообщение"
Ukrainian: "Останнє повідомлення"

5. Items of "Topic" column
English: "by (author's name) in (branch's name)"
Russian: "от (author's name) в (branch's name)"
Ukrainian: "від (author's name) в (branch's name)"