fix n#71, n#65, n#60, n#56, n#52 and more

- n#71. enroll button style
- n#65. enlarge font-size in board/issue
- n#60. repositioned label tag in issue list item
- n#56. duplicated yobi.Label init
- n#52. change text on active
- switch issue state color between closed with open
move search panel to left on issue list
Merge pull request #423 from laziel/fix-ui-130801

UI changes(130801)