Allow change in ratio for Actors and Stores

[jgadsden]

Describe what problem your feature request solves
Actors and Data Stores may have short or long names that would look best with a change in ratio + size

Describe the solution you'd like
Ratio should be fixed only for processes, so that Actors and Stores can change shape while still be rectangles

Additional context
User feedback "External Actors and Datastores, it would be lovely to resize without locking width/height ratio – for objects with very short names, the current objects use up a lot of screen space"

[jgadsden]

Marking as bug because this is missing behaviour which was present in version 1.x