editModal: Create Add Modal: server function
In JamesCuster/CARTMod: Functions and Shiny Modules for CART

This function and addModalUI are used in conjunction to create the UI and server elements necessary to control the modal

editModal(
  input,
  output,
  session,
  inputData,
  reactiveData,
  checkDuplicate,
  db,
  dbTable,
  modalUI,
  staticChoices,
  dtRow,
  ...
)

`input`	These parameters are handled by `callModule` and can be ignored.
`output`	These parameters are handled by `callModule` and can be ignored.
`session`	These parameters are handled by `callModule` and can be ignored.
`inputData`	a `data.frame` containing columns `ids, labels, type, choicesTable, choicesValues, choicesLabels` which correspond to `ids` The field names in the database. These ids will also be used as the inputId for shiny inputs. `labels` These are character values which will be used as the label for shiny inputs and be displayed above the input in the UI. `type` The type of shiny input to be used. `choicesTable, choicesValues, choicesLabels` Only used if the desired input has predefined choices (`selectInput/selectizeInput)`. If neither of these inputs are used, then the values should be `NA`. If one of these inputs is used then: `choicesTable` Is the table in the database where the choices for the given input are. `choicesValues` Is the column in the table which stores the numeric identifier for the choice `choicesLabels` Is the column in the table which stores the character name for the choices
`reactiveData`	Reactive which stores all of the tables from the database as seperate `data.frames`
`checkDuplicate`	character vector specifing which fields to check for possible duplication. Default value is null, and no fields are checked for duplicates
`db`	a `DBIConnection` object, as returned by `dbConnect`. In other words, the object the database connection is saved to.
`dbTable`	The database table the new data will be added to.
`modalUI`	Function that creates the modal UI.
`staticChoices`	`list` where choices for static selectize inputs are defined.
`dtRow`	Reactive which stores the row selected in the datatable
`...`	Additional parameters to mass to modalUI function