Removes unused view
fixes context menu link on my page
Implements quoting for work package edit form
Uses work package controller's index action
Uses work packages path
Moves #quoted tests to specs

[skip ci]
Reworks quoting spec layout

[skip ci]
Adds description quoting cuke

[skip ci]
Adds changelog entry
generalize work_package#preview into journals#preview

WorkPackages#preview was essentially two methods now. I could have changed that by splitting it up into #preview and #journal_preview but other journals might need previewing, too.
indentation fixes
cleanup work_package#quoted
removes unsupported format
removes hard dependency on work_packages from journals_helper
replaces issues controller links on my page
uses work_packages_controller for action menu

It was not yet possible to replace bulk_edit as the controller does not yet provide such an action
replaces issue links in mails with work package links
fixes context menu translations
renames occurances of link_to_issue in favor of link_to_work_package
Merge pull request #392 from opf/feature/move_issue_links_to_work_package_controller

[FEATURE] Move issue links to work package controller