WM: Styled delete modal
WM: Width & center buttons fix, closes #515
PLD: default hide delete modal
Solving the multiple chart problem in the most straightforward way. Note that I could make it more resilient to more charts being added in show.html, but not worth it, given that the chart view will be entirely re-written to be on the front end later on anyways. @wilo99: please note that inserting more than one chart block into show.html is a bug at the moment.
Merge pull request #567 from onaio/515_style_delete_modal

515 style delete modal
PLD: use drop hover on new chart button
Merge pull request #569 from onaio/568_single_submission_view_chart

Solving the multiple chart problem in the most straightforward way. Note...
PLD: add kibit
PLD: refactor based on kibit suggestions