Integrate Global OSC Parameters into GUI

[aalex]

OSC parameters (host, address, port) for both OSC Send and Receive are now global, shared by all generators.

These settings, which are currently implemented individually on a per-generator basis, need to be turned into a single, global instance to control all generators simultaneously.

Depends on #226

Criteria

• Add a global OSC sending and host in the UI.
• Add a global receiving port in the UI.
• The changes are effective directly.
• Save the host and ports in the project
• Load the host and ports from the project
• Use same GUI layout as is currently implemented for individual generators, but in global section
• Remove OSC parameters from individual generators' json files

[aalex]

Waiting on the parameters to be exposed from the backend to the GUI.