Added 'title' attribute to 'img' tag.

Author: sanganinamrata

app/code/Magento/Backend/view/adminhtml/templates/page/header.phtml

@@ -17,7 +17,7 @@
             <?= /* @escapeNotVerified */ $edition ?>
             class="logo">
             <img class="logo-img" src="<?= /* @escapeNotVerified */ $block->getViewFileUrl($logoSrc) ?>"
-            alt="<?= $block->escapeHtml(__('Magento Admin Panel')) ?>"/>
+            alt="<?= $block->escapeHtml(__('Magento Admin Panel')) ?>" title="<?= $block->escapeHtml(__('Magento Admin Panel')) ?>"/>
         </a>
     <?php break; ?>
     <?php case 'user': ?>

app/code/Magento/Backend/view/adminhtml/templates/widget/form/element/gallery.phtml

@@ -34,7 +34,7 @@
         <?php foreach ($block->getValues()->getAttributeBackend()->getImageTypes() as $type): ?>
             <td class="gallery" align="center" style="vertical-align:bottom;">
             <a href="<?= /* @escapeNotVerified */ $image->setType($type)->getSourceUrl() ?>" target="_blank" onclick="imagePreview('<?= $block->getElement()->getHtmlId() ?>_image_<?= /* @escapeNotVerified */ $type ?>_<?= /* @escapeNotVerified */ $image->getValueId() ?>');return false;">
-            <img id="<?= $block->getElement()->getHtmlId() ?>_image_<?= /* @escapeNotVerified */ $type ?>_<?= /* @escapeNotVerified */ $image->getValueId() ?>" src="<?= /* @escapeNotVerified */ $image->setType($type)->getSourceUrl() ?>?<?= /* @escapeNotVerified */ time() ?>" alt="<?= /* @escapeNotVerified */ $image->getValue() ?>" height="25" class="small-image-preview v-middle"/></a><br/>
+            <img id="<?= $block->getElement()->getHtmlId() ?>_image_<?= /* @escapeNotVerified */ $type ?>_<?= /* @escapeNotVerified */ $image->getValueId() ?>" src="<?= /* @escapeNotVerified */ $image->setType($type)->getSourceUrl() ?>?<?= /* @escapeNotVerified */ time() ?>" alt="<?= /* @escapeNotVerified */ $image->getValue() ?>" title="<?= /* @escapeNotVerified */ $image->getValue() ?>" height="25" class="small-image-preview v-middle"/></a><br/>
             <input type="file" name="<?= /* @escapeNotVerified */ $block->getElement()->getName() ?>_<?= /* @escapeNotVerified */ $type ?>[<?= /* @escapeNotVerified */ $image->getValueId() ?>]" size="1"></td>
         <?php endforeach; ?>
         <td class="gallery" align="center" style="vertical-align:bottom;"><input type="input" name="<?= /* @escapeNotVerified */ $block->getElement()->getParentName() ?>[position][<?= /* @escapeNotVerified */ $image->getValueId() ?>]" value="<?= /* @escapeNotVerified */ $image->getPosition() ?>" id="<?= $block->getElement()->getHtmlId() ?>_position_<?= /* @escapeNotVerified */ $image->getValueId() ?>" size="3"/></td>

app/code/Magento/Ui/view/base/web/templates/block-loader.html

@@ -6,6 +6,6 @@
 -->
 <div data-role="loader" class="loading-mask" style="position: absolute;">
     <div class="loader">
-        <img src="<%= loaderImageHref %>" alt="Loading..." style="position: absolute;">
+        <img src="<%= loaderImageHref %>" alt="Loading..." title="Loading..." style="position: absolute;">
     </div>
 </div>