The functions LrDialogs.presentFloatingDialog() and .showStringsDialog() are undocumented. Perhaps Adobe could provide a quick reply here with their signatures and what they do.
13/02/04 09:27:22com.johnrellis.logger TRACE Eval: LrDialogs
{--table: 1
messageWithDoNotShow = function: 0000000016A46990,
promptForActionWithDoNotShow = function: 0000000016A469E0,
confirm = function: 0000000016A46800,
resetDoNotShowFlag = function: 0000000016A46A30,
attachErrorDialogToFunctionContext = function: 0000000016A46530,
runOpenPanel = function: 0000000016A46580,
message = function: 0000000016A465D0,
runSavePanel = function: 0000000016A467B0,
presentFloatingDialog = function: 0000000016A46670,
stopModalWithResult = function: 0000000016A46760,
presentModalDialog = function: 0000000016A46940,
showModalProgressDialog = function: 0000000016A466C0,
showStringsDialog = function: 0000000016A46490,
showError = function: 0000000016A46620}