Merge pull request #145 from mikelimantara/master

Fix bug with next and back in UI, redirect user to the right page after command execution
Removed the viewing modes from category hashmap
Set window key press handler
Bugfix: only focus at console when event text is not empty
Animations in TaskOverview
Highlight task
Merge pull request #147 from andhieka/working

Animations in TaskOverview
Bugfix on page change
Merge pull request #148 from andhieka/working

Bugfix on page change
attempt to resolve 1
Refactor Category to have its own list for the tasks under the category