handle the error when can't write "hits" as "int" better

[LeeDr]

Loading beats-dashboards before saving docs in Kibana breaks Timelion and the user just gets a blank screen.

beats-dashboards/issues/94

From the dev console;

{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"mapper [hits] cannot be changed
 from type [long] to [int]"}],"type":"illegal_argument_exception","reason":"mapper [hits] cannot be changed
 from type [long] to [int]"},"status":400}

From sense GET /.kibana/_mapping after beats-dashboards are loaded;

      "dashboard": {
        "properties": {
          "description": {
            "type": "string"
          },
          "hits": {
            "type": "long"
          },

[andremilk]

I am also getting this.

From my elasticsearch log:

[2016-08-15
18:31:44,171][DEBUG][action.admin.indices.mapping.put] [Dead Girl] failed to put mappings on indices [[.kibana]], type [timelion-sheet]
java.lang.IllegalArgumentException: mapper [hits] cannot be changed from type [long] to [int]

I am running kibana 4.5.4.
I just installed timelion and tried out to see this

I deleted the .kibana index and then it worked.