Fix the legacy "25, 50, 100, unlimited" Harbormaster log links to respect generation selection

Summary:
See PHI565. Ref T13120. Although this older log is on the chopping block (see T13088), there's some migration guidance and other complexity around just replacing it.

Until it gets replaced, make clicking the "number of lines" elements respect the current "Build Generation" setting. Prior to this change, clicking the links would lose the generation information and jump you to the most recent build generation.

Also fix some collateral damage from T13105 where we ended up with white text on a white background in some cases.

Test Plan:

• Restarted a build to get multiple generations.
• On each generation, clicked the various "25", "50", etc., links.
• Saw generation and log window sizes both respected by the links.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13120

Differential Revision: https://secure.phabricator.com/D19367