[state] disable saving to sessionStorage by default

Rather than enable a behavior we would rather not keep by default, we'll keep it opt-in and link to it so that users who have issues can find the setting

src/ui/public/chrome/api/angular.js

@@ -5,7 +5,7 @@ import modules from 'ui/modules';
 import Notifier from 'ui/notify/notifier';
 import { UrlOverflowServiceProvider } from '../../error_url_overflow';
 
-const URL_LIMIT_WARN_WITHIN = 150;
+const URL_LIMIT_WARN_WITHIN = 1000;
 
 module.exports = function (chrome, internals) {
 
@@ -57,10 +57,20 @@ module.exports = function (chrome, internals) {
 
         try {
           if (urlOverflow.check($location.absUrl()) <= URL_LIMIT_WARN_WITHIN) {
-            notify.warning(`
-              The URL has gotten big and may cause Kibana
-              to stop working. Please simplify the data on screen.
-            `);
+            notify.directive({
+              template: `
+                <p>
+                  The URL has gotten big and may cause Kibana
+                  to stop working. Please either enable the
+                  <code>state:storeInSessionStorage</code>
+                  option in the <a href="#/management/kibana/settings">advanced
+                  settings</a> or simplify the onscreen visuals.
+                </p>
+              `
+            }, {
+              type: 'error',
+              actions: [{ text: 'close' }]
+            });
           }
         } catch (e) {
           const { host, path, search, protocol } = parseUrl(window.location.href);

src/ui/public/error_url_overflow/error_url_overflow.html

@@ -9,6 +9,7 @@
   <h3>Ok, how do I fix this?</h3>
   <p>This usually only happens with big, complex dashboards, so you have some options:</p>
   <ol>
+    <li>Enable the <code>state:storeInSessionStorage</code> option in the <a href="#/management/kibana/settings">advanced settings</a>. This will prevent the URLs from getting long, but makes them a bit less portable.</li>
     <li>Remove some stuff from your dashboard. This will reduce the length of the URL and keep IE in a good place.</li>
     <li>Don't use IE. Every other supported browser we know of doesn't have this limit.</li>
   </ol>

src/ui/settings/defaults.js

@@ -283,7 +283,7 @@ export default function defaultSettingsProvider() {
       description: 'Your API key from www.quandl.com'
     },
     'state:storeInSessionStorage': {
-      value: true,
+      value: false,
       description: 'The URL can sometimes grow to be too large for some browsers to ' +
         'handle. To counter-act this we are testing if storing parts of the URL in ' +
         'sessions storage could help. Please let us know how it goes!'