Import warning changes and people import metadata validation
Changes to metadata check for people import
Enable pre-caching mustache templates from extensions

* Previously, including them would change the path/name used in
  GGRC.Templates; now it checks for 'assets/mustache' in the path and
  removes it.
Add mustaches in ggrc_basic_permissions to GGRC.Templates
lock icons appear in all program lists now
Fixed tooltips sometimes disappearing in modals
event listing fix
events list unmapped and deleted details
Added iframe sandboxing to prevent preview popovers from forcing a redirect
Merge pull request #394 from reciprocity/feature/reference_tooltip

Added iframe sandboxing to prevent iframes from redirecting
Merge pull request #373 from reciprocity/feature/import_work_57098872

Import changes (network_zone related) and people import type checks
Merge pull request #388 from reciprocity/feature/private-icons-update

lock icons appear in all program lists now
Merge pull request #377 from reciprocity/feature/assets-cleanup

Fix mustache pre-caching for extensions
Adding allow-same-origin for iframe previews in case of logins
Merge pull request #393 from reciprocity/feature/events-update

Events logging update (audit-free)
Merge pull request #389 from reciprocity/feature/wysiwyg_tooltip

Fixed tooltips disappearing in modals
Merge pull request #397 from reciprocity/feature/iframe_tweak

Added allow-same-origin to iframe sandbox
Merge remote-tracking branch 'origin/develop' into feature/import_work_oct1

Conflicts:
	src/ggrc/converters/base_row.py