HTML/CSS: Fix remove space modal

[catrobson]

The remove space modal should be changed so that:

• The kabob action is "Delete Space" (On My Spaces page)
• The modal is titled "Delete Space"
• The text is "Are you sure you want to delete your space, ?"
• The buttons are right aligned and follow the delete modal standard set out in this design: https://github.com/openshiftio/openshift.io/issues/2107#issuecomment-361645961

Related to https://github.com/openshiftio/openshift.io/issues/2107

[catrobson]

Closing as we have a delete space story already.