Allow search in tm_file_viewer (#882)

Fixes #152 

Just adding `search = TRUE` argument

Author: donyunardi

R/tm_file_viewer.R

@@ -116,7 +116,8 @@ ui_viewer <- function(id, ...) {
           dragAndDrop = FALSE,
           sort = FALSE,
           theme = "proton",
-          multiple = FALSE
+          multiple = FALSE,
+          search = TRUE
         )
       )
     )