Refactor the creation and playback of OpenBCI GUI data files

[retiutut]

• Fixes #1119

• Also changes Default Railed percentages to 90% and 75%.

[retiutut]

Still TODO:

• [x] Create datasourceplayback classes for every board
• [x] Add cases for every board to getDataSourcePlaybackClassFromFile() in DataSourcePlayback.pde
• [x] Create playback files using every board class
• [x] Test playback files from every board class

[retiutut]

Tested with:

• Cyton
• Cyton Daisy
• Cyton Daisy + Accelerometer
• Cyton Daisy + Analog Read
• Cyton Daisy + Digital Read (with pressing PROG)
• Ganglion Native Bluetooth
• Ganglion BLE112 Dongle
• Synthetic Board (yes this generates a file for testing and development reasons)
• Playback History Widget playing back all of the above use cases in rapid succession within one session

[retiutut]

In W_Playback the MenuList object does not perform well upon resizing. This should be replaced by an array of buttons or some other solution. All other calls to this UI object are not resized, as they are in the Control Panel.

[retiutut]

Sending to NYC office for final testing as performed here: https://github.com/OpenBCI/OpenBCI_GUI/pull/1120#issuecomment-1536686587

[retiutut]

Playback mode is working great on my end. I tested all the board configurations you mentioned. A few notes:

• The first time I click “Select OpenBCI playback file” after launching the GUI, the open file explorer window opens behind my other windows (Windows 10). Only happens the first time I click the button.
• Error when trying to record a 16 channel synthetic stream. Don’t get this problem when testing GUI 5.1.0
• Maybe add name of selected file below “Select OpenBCI playback file”. Not necessary but it confused me at first if I had selected a file

Great catch! I'll fix this here in this PR. The session settings for both playback and synthetic sessions were misnamed.

We do say in the status bar at the bottom of the GUI that the file was selected. Also appears in the console log. We do this in the status bar since there is enough space to display longer file names.

[retiutut]

Ok @isaacplotkin, the fix for synthetic mode not launching is in.

[isaacplotkin]

Great, synthetic mode fix is working for me.