centering "message filter button" [message_list.c]

[eugenikus8]

• text offset in legione. Prevent text from overlapping or going out of the Legion window with a different locale than english.
• text offset (barracks). Prevent text from overlapping or going out window with a different locale than english.
• the numeric input window now looks better.
• "scenario events" window can accommodate 7 (previously 5) lines for both "Conditions" and "Actions".
• minor fix advisors windows (offset text).
• minimum repeat value for "reques" is 1.
• minimum repeat value for "invasion" is 1.

[crudelios]

Some very minor formatting changes