FCPPluginClient: JavaDoc fixes

- Don't use "@see" linking to private member variable in public getter.
The private stuff won't be visible from HTML JavaDoc.
- Link the function with which the value of the getter is used.
FCPPluginClient: JavaDoc fixes

- Don't use "@see" linking to private member variable in public
getter.
The private stuff won't be visible from HTML JavaDoc.
- Link the function with which the value of the getter is used.