IdStory Identity Manager

Feedback from #3127. Please improve the optional columns role criticality (priority) and description in the places, where there are displayed assigned roles of identity:

• We need those two columns also in the role request form, see the original request from our customer (#3033)
  When adding new roles, they need to see the criticality of the role in order to know that an approval process will follow and the roles will not be assigned immediately
  
• The column for the description is not very wide and its width is fixed, it doesn't look well if the description is longer. (Especially if there were more roles with longer description)
  
• The dashboard ignores the configured order of the columns
  

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Tested on current develop, configuration:
idm.pub.app.show.identityRole.table.columns=role, priority, description, identityContract, contractPosition, validFrom, validTill, directRole, automaticRole, incompatibleRoles
idm.pub.core.identity.dashboard.skip=false
idm.pub.app.show.environment=false