Fix a few minor bugs in Settings tab[CPP-618][CPP-634]

[john-michaelburke]

• Fixes issue when user would have Advanced settings shown, scroll all the way to the bottom, then uncheck Advanced. The scrollbar would be out of bounds. This will reset it to the correct location in this situation.
• Fixed issue with flakey dropdowns after more than one change. When checking if the value on the device is the same as the proposed change it was comparing with a copy of the value instead of a pointer. I refactored the logic so it will always evaluate based off a pointer to the element.
• Fixed some flakey advanced settings flakiness. Now instead of relying on a callback to trigger showing advanced settings it points to a pointer to the buttons checked property.
• Also decided to revert back to the Settings Table clearing between connections to prevent a few new bugs observed that I am having trouble replicating.