issue_ui: made search into a one liner

Search with:
  search <term>
Inside an issue.
issue_ui: remove redundant search command
domain/issue.rb: add colors to printing. Better organization
domain/issue.rb: break long description to smaller lines
domain/issue.rb: break more lines in issue
domain/helpers: don't explode if no string provided.
ui/issue_ui: fix annoying message on 'end' cmd