Fix #11352: Network server info could be cropped.

[PeterN]

Motivation / Problem

As per #11352, Some fields in the information panel of the network server list are cropped and unreadable.

Description

Draw all network server info as multiline strings. This also allows the 'header' (which is not actually a widget) to grow as necessary to fit the server name.

Although the original report mentions the server address, since most servers use the invite system now this is not really relevant -- however this issue also applied to the server name, which is now fully visible.

Limitations

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

• The bug fix is important enough to be backported? (label: 'backport requested')
• This PR touches english.txt or translations? Check the guidelines
• This PR affects the save game format? (label 'savegame upgrade')
• This PR affects the GS/AI API? (label 'needs review: Script API')
  • ai_changelog.hpp, game_changelog.hpp need updating.
  • The compatibility wrappers (compat_*.nut) need updating.
• This PR affects the NewGRF API? (label 'needs review: NewGRF')
  • newgrf_debug_data.h may need updating.
  • PR must be added to API tracker