style(iot-hub): widen createdTime column for added install time

Bump the installed-items table .mat-column-createdTime width
from 100px to 160px so the new "MMM d, y, h:mm a" format
(introduced when the column started showing the install time)
fits without wrapping or ellipsis.

ui-ngx/src/app/modules/home/components/iot-hub/iot-hub-installed-items-table.component.scss

@@ -72,9 +72,9 @@
 }
 
 .mat-column-createdTime {
-  width: 100px;
+  width: 160px;
-  min-width: 100px;
+  min-width: 160px;
-  max-width: 100px;
+  max-width: 160px;
 }
 
 .mat-column-updates {