As an admin
I want to be able to set the limit of file size per mime type
so that I can have a different limit for different types of files.
Given a Liferay instance and site A
When an admin sets a value for a particular mimetype
Then users won't be able to upload files of that mimetype bigger than the limit set.
Given a Liferay instance and site A with a file size limit at system level
When an admin sets a value for max file size at site level for a specific mimetype
Then the limit established at mimetype level takes precedence.