Merge pull request #26 from irasally/add-download-icon

見積り出力ボタンにアイコンをつけた
Merge branch 'master' of github.com:ESTCOSMO/mitsumottaro into change-dashbord-design
Merge branch 'master' of github.com:ESTCOSMO/mitsumottaro into fix-total-label-style
Merge pull request #27 from irasally/fix-total-label-style

並んでいるラベルとボタンの高さをそろえる
Merge branch 'master' of github.com:ESTCOSMO/mitsumottaro into change-dashbord-design
Changed new item icon.