Consistency of captions with JIRA captions and other

[Sergiy Lizenko]

I deliver time-sheet Excels together with other Excels generated from JIRA, so consistency of terminology is important.

1. Type -> Issue Type
2. Title -> Summary
3. Timespent (h) -> Time Spent, (h) is not needed, since denominator is shown in cells
4. Comment -> Work Description, not to confuse with issue comment
5. Started -> Date Started
6. Add Priority column is appreciated, especially as priority is shown on the screens

[Andriy Zhdanov]

Should be fixed too

[Sergiy Lizenko]

Fixed. Thanks!