dev/core#160 Set the import progress widget to poll the server every …

[seamuslee001]

…5s rather than every 5ms

Overview

This sets the interval at which the import progress bar should poll the server to be 5s rather than 5ms

Before

Import progress bar could generate an equivilant to a DOS attack on a server as it was polling over 200times a second
After

importer only polls the server every 5s

It appears that the 5 was meant to be s but the js is believing its ms

ping @monishdeb @colemanw @eileenmcnaughton

[eileenmcnaughton]

OK - this seems to bear out @seamuslee001 analysis of the variable type https://www.w3schools.com/jsref/met_win_setinterval.asp & also @seamuslee001 advises it has had internal testing - merging