* Added dark them to graph control, started dark theme for the controls on the graph
* Dark theme for graphing mode updated to use event model, diagnostics added, cleaned up code that wasn't needed
* Updated prepare-release-internalonly.yaml internal package version
* Updated Theme Settings properties, removed version change, other small changes from PR feedback>
* Updated the localSettings check and updated the GraphTheme event to send bool instead of string
* Updated the equation line color to change with the graph theme
* Rebased onto master and issues created during the rebase
* Updates per code review feedback
* Update settings properties to just have IsMatchAppTheme property and updated the high contrast settings for the graph control
* Match version to current in master
* Updated per PR feedback
* Fix resetting the m_lastLineColorIndex to only happen when reassignColors is true
* Changed second if to else if in the OnPropertyChanged method
* fixed control button and equation line colors
