If plot is empty, initialize well allocation plot with case, first producer and last available time step
Make sure that all flow diagnostics plots are visible at all times.
* Improve plot naming for depth track plots
* Move template text replace to string tools
* More data available for object template text
* Set plot visible and define default object name template text
* Add curve name template and handling of string variables
* Mark autoName as obsolete field
* Use key-value map to populate variable values
* Add curve naming methods Auto, Custom and Template
