Fix problems when user changes parameter(s)

[monaw]

1. Currently if the user changes a parameter (eg cell size), the data is reloaded and table is recalculated. Change this to:
   • [x] not reload data
   • [x] not recalculate table

See this comment below on parameters used for the 2 tables.

2. Change behavior so that when the user changes following parameters, the listed function will be called again:
   • [x] sig2obs - calculateRaster2D(), plotMKDE()
   • [x] t max - calculateRaster2D(), plotMKDE()
   • [x] cell size - calculateRaster2D(), plotMKDE()
   • [x] buffer - calculateRaster2D(), plotMKDE()
   • [x] probabilities - plotMKDE()

See this comment below on processing order and parameters used.

[monaw]

For the All and Summary tables:

1. table_all data comes from gps$original which comes from preprocessDataframe() which comes from loadDataframeFrom*()
2. table_summary data comes from gps$summary which comes from animalAttributes(...,input$cellsize) which comes from preprocessDataframe() which comes from loadDataframeFrom*()

[monaw]

Order of processing:

1. user initiates loadDataframeFrom*()
2. preprocessDataframe() -> gps$data, gps$original
3. animalAttributes() -> gps$summary
4. user initiates plot
5. calculateRaster2D((gps$data), input$sig2obs, input$tmax, input$cellsize, (input$buffer)...) -> gps$rasters
6. plotMKDE((gps$rasters), input$probability...)