Comment out implications to role PublicProgramEditor

* It is undefined
Improve query strategy for context implications

* Before, it made one query per context implication; now it makes one
  query for all implied roles
Fix usage of mustache helper `ggrc_config_value`

* Mistakenly used `ggrc_config` before.
Merge pull request #950 from reciprocity/feature/fix-risk-assessment-link

Fix usage of mustache helper `ggrc_config_value`
Merge pull request #947 from reciprocity/feature/avoid-permission-query-duplication

Fix performance regression related to implied role lookups
Merge remote-tracking branch 'origin/develop' into feature/public-program-editor

Conflicts:
	src/ggrc_basic_permissions/contributed_roles.py