IfElseTimedateCompare: Compares two times and returns greater or lesser value
In Blakemassey/baear: Functions for Bald Eagle Data Manipulation and Model Fitting

Examines two time columns, returns the greater or lesser value and inserts that value in a result column

1	IfElseTimedateCompare(df, col1, col2, result, default_tz, tz)

`df`	Dataframe of location data.
`col1`	Column name, col1 is compared to col2
`sign`	String, either ">" or "<" for returning greater than or less than values, respectively. Default is ">".
`col2`	Column name, col2 is compared to col1.
`result`	String, name of column to insert results. Default is "result".
`default_tz`	String, timezone that timedate reverts to, based on OS time.
`tz`	String, timezone of original data (may be different from default_tz).