add_view_col: Function to add the View button
In stanstrup/PeakABro: PeakABro

Internal function for the datatables View button that opens the modal

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add_view_col(X, offset, modal_col)

shinyInput(FUN, len, id, offset, label, ...)

`X`	The table to add buttons to.
`offset`	A numeric vector. Offset for the button id for each row.
`modal_col`	A string. The second nesting for feature annotations.
`FUN`	The shiny Input function to create.
`len`	Integer How many buttons to make.
`id`	String. Prefix for the id.
`label`	A character vector. The text to but on each button. Should have the same length as the number of rows in X.
`...`