Added a new dashboard to rebuild xml structures for content, members, media. I haven't put it in the release dashboard config for now. Also added methods to the examine controller to check the index integrity which we can use for th 7.3 task.

src/Umbraco.Web.UI.Client/src/views/dashboard/developer/xmldataintegrityreport.controller.js

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+function xmlDataIntegrityReportController($scope, umbRequestHelper, $log, $http, $q, $timeout) {
+
+    function check(item) {
+        var action = item.check;
+        umbRequestHelper.resourcePromise(
+                $http.get(umbRequestHelper.getApiUrl("xmlDataIntegrityBaseUrl", action)),
+                'Failed to retrieve data integrity status')
+            .then(function(result) {
+                item.checking = false;
+                item.invalid = result === "false";
+            });
+    }
+
+    $scope.fix = function(item) {
+        var action = item.fix;
+        if (item.fix) {
+            if (confirm("This will cause all xml structures for this type to be rebuilt. " +
+                "Depending on how much content there is in your site this could take a while. " +
+                "It is not recommended to rebuild xml structures if they are not out of sync, during times of high website traffic " +
+                "or when editors are editing content.")) {
+                item.fixing = true;
+                umbRequestHelper.resourcePromise(
+                    $http.post(umbRequestHelper.getApiUrl("xmlDataIntegrityBaseUrl", action)),
+                    'Failed to retrieve data integrity status')
+                .then(function (result) {
+                    item.fixing = false;
+                    item.invalid = result === "false";
+                });
+            }
+        }
+    }
+
+    $scope.items = {
+        "contentXml": {
+            label: "Content in the cmsContentXml table",
+            checking: true,
+            fixing: false,
+            fix: "FixContentXmlTable",
+            check: "CheckContentXmlTable"
+        },
+        "mediaXml": {
+            label: "Media in the cmsContentXml table",
+            checking: true,
+            fixing: false,
+            fix: "FixMediaXmlTable",
+            check: "CheckMediaXmlTable"
+        },
+        "memberXml": {
+            label: "Members in the cmsContentXml table",
+            checking: true,
+            fixing: false,
+            fix: "FixMembersXmlTable",
+            check: "CheckMembersXmlTable"
+        }
+    };
+
+    for (var i in $scope.items) {
+        check($scope.items[i]);
+    }
+
+}
+angular.module("umbraco").controller("Umbraco.Dashboard.XmlDataIntegrityReportController", xmlDataIntegrityReportController);

src/Umbraco.Web.UI.Client/src/views/dashboard/developer/xmldataintegrityreport.html

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+<div id="examineManagement" ng-controller="Umbraco.Dashboard.XmlDataIntegrityReportController">
+
+    <h3>Xml Cache Data integrity</h3>
+
+    <div ng-show="loading">
+        Loading...
+    </div>
+
+    <p>
+        This checks the data integrity for the xml structures for content, media and members that are stored in the cmsContentXml table.
+        This does not check the data integrity of the xml cache file, only the xml structures stored in the database used to create the xml cache file.
+    </p>
+    <div ng-repeat="(key, value) in items" class="umb-pane">
+        <span class="">{{value.label}}&nbsp;...</span>
+        <span ng-if="value.checking" class="text-info">Checking...</span>
+        <span ng-if="!value.checking && !value.invalid" class="text-success"><strong>Ok</strong></span>
+        <span ng-if="!value.checking && value.invalid" class="text-error"><strong>Error</strong></span>
+        <div ng-show="value.fix && !value.fixing">
+            <button type="button" ng-click="fix(value)" class="btn btn-warning">
+                <span ng-if="value.invalid">Fix</span>
+                <span ng-if="!value.invalid">Rebuild</span>
+            </button>
+        </div>
+        <div class="umb-loader-wrapper" ng-show="value.fixing">
+            <div class="umb-loader"></div>
+        </div>
+    </div>
+
+
+
+</div>