MDL-55324 atto_media: Reduce maximum height of atto modal

Previously after adding a few sources or expanding a few fieldsets
the modal would be pushed off the bottom of the screen. Here we
reduce the maximum height to allow it to remain visible.

lib/editor/atto/plugins/media/styles.css

@@ -6,7 +6,7 @@
 }
 
 .atto_form.atto_media > .tab-content {
-    max-height: 60vh;
+    max-height: 45vh;
     overflow-x: hidden;
     padding-left: 20px;
     padding-right: 20px;

lib/editor/atto/plugins/media/tests/behat/media.feature

@@ -58,6 +58,7 @@ Feature: Add media to Atto
   And I click on "Private files" "link" in the ".moodle-dialogue-base[aria-hidden='false'] .fp-repo-area" "css_element"
   And I click on "moodle-logo.png" "link"
   And I click on "Select this file" "button" in the ".moodle-dialogue-base[aria-hidden='false']" "css_element"
+  And I change window size to "large"
   And I set the field with xpath "//*[contains(concat(' ', normalize-space(@class), ' '), ' atto_media_width_entry ')]" to "420"
   And I set the field with xpath "//*[contains(concat(' ', normalize-space(@class), ' '), ' atto_media_height_entry ')]" to "69"
   And I click on "Display options" "link"

lib/editor/atto/plugins/media/yui/build/moodle-atto_media-button/moodle-atto_media-button-debug.js

@@ -740,7 +740,6 @@ Y.namespace('M.atto_media').Button = Y.Base.create('button', Y.M.editor_atto.Edi
      * @private
      */
     _addMediaSourceComponent: function(element, callback) {
-        window.console.log(this.get('help').addsource);
         var mediumType = this._getMediumTypeFromTabPane(element.ancestor('.tab-pane'));
         var context = this._getContext({
             multisource: true,

lib/editor/atto/plugins/media/yui/build/moodle-atto_media-button/moodle-atto_media-button.js

@@ -740,7 +740,6 @@ Y.namespace('M.atto_media').Button = Y.Base.create('button', Y.M.editor_atto.Edi
      * @private
      */
     _addMediaSourceComponent: function(element, callback) {
-        window.console.log(this.get('help').addsource);
         var mediumType = this._getMediumTypeFromTabPane(element.ancestor('.tab-pane'));
         var context = this._getContext({
             multisource: true,

lib/editor/atto/plugins/media/yui/src/button/js/button.js

@@ -738,7 +738,6 @@ Y.namespace('M.atto_media').Button = Y.Base.create('button', Y.M.editor_atto.Edi
      * @private
      */
     _addMediaSourceComponent: function(element, callback) {
-        window.console.log(this.get('help').addsource);
         var mediumType = this._getMediumTypeFromTabPane(element.ancestor('.tab-pane'));
         var context = this._getContext({
             multisource: true,