fix(logs): fix bright rows even on dark mode (closes tjcsl#1642)

[aarushtools]

Proposed changes

• add dark/logs.scss
• use css to style even table rows instead of js

Brief description of rationale

• fixes issue where even rows were white instead of a darker color on dark mode

before (from the issue page):

after:

[aarushtools]

Should I collectstatic and add those files into my commit or is it fine?

[coveralls]

coverage: 79.447% (+0.04%) from 79.412%
when pulling b764036 on aarushtools:logs-darkmode-fix
into 1d1ff53 on tjcsl:dev.

[coveralls]

coverage: 79.447% (+0.04%) from 79.412%
when pulling d0342ae on aarushtools:logs-darkmode-fix
into 1d1ff53 on tjcsl:dev.