revert(party): Round boss health up instead of to nearest integer

This reverts commit 626da5681f5ea95700f8ddf40587c7184926971c.

Fixes #2563.
Merge branch 'round-boss' into develop
Added tests for translations (env.t)
fix(translations): fix #2564 and similar ones
fix(mounts): Move avatar upward when mounted regardless of pet

Step 1 toward fixing some of our mount sprite positioning issues. If the avatar always moves up when mounted, we gain substantial freedom to reposition the mount, especially on the vertical axis.
Merge remote-tracking branch 'habitrpg/develop' into develop