TweetUtils: Fix ampersands in urls

Escaping them is wrong.
ITimeline: Remove function parameter from load_newest_internal

Not needed anymore since we introduced the function property
ITimeline: Remove one more function parameter
HomeTimeline: Always mark user's tweets seen
tweet-info-page: Layout fixes
TweetInfoPage: Move text style to ui file
Tweet: Sort urls directly when parsing

Like this, we only have to do it once. Also, as a side effect, it fixes
links in tweets. And took 6 hours to find.
tests/tweet_entities: Add test cases

checks the url bug we just fixed