Fix typos:

`focussed` -> `focused`,
  `focussing` -> `focusing`,
  `readible` -> `readable`,
  `featers` -> `features`,
  `nagivation` -> `navigation`,
  `Aplication` -> `Application`,
  `Furter` -> `Further`,
  `desactivation` -> `deactivation`,
  `scolling` -> `scrolling`,
  `transparancy` -> `transparency`,
  `compatibilty` -> `compatibility`,
  `Numberred` -> `Numbered`,
  `paramter` -> `parameter`,
  `directiories` -> `directories`,
  `hight` -> `height`,
  `srcoll` -> `scroll`,
  `Overal` -> `Overall`