Update name of sensors export file

- Now the name of exported sensors file will be combination of date
  and sensors as prefix.

Signed-off-by: Suren Neware <sneware9@in.ibm.com>
Change-Id: Ie30a1b5e61ad47bc2e78f173945b54ed73a873a5
diff --git a/src/locales/en-US.json b/src/locales/en-US.json
index e0da709..127df61 100644
--- a/src/locales/en-US.json
+++ b/src/locales/en-US.json
@@ -522,6 +522,7 @@
     }
   },
   "pageSensors": {
+    "exportFilePrefix": "sensors_",
     "searchForSensors": "Search for sensors",
     "table": {
       "currentValue": "Current value",