format ublt-navigation
fix window jumping when scrolling by screenful

The cause was `scroll-preserve-screen-position' not taking
`scroll-margin' into account.
keep current column when using `move-to-window-line-top-bottom'
don't use evil motion in info-mode, which has its own navigation bindings
format ublt-appearance
add ublt/remove-hard-wrap
comment defadvice's, fix jumpy evil-scroll-page-down
fix jumpy scrolling in Info-mode