style: initial tweaks for Image+ alt button (still need 3px or so top margin)

Author: rthrash

assets/components/modai/css/mgr.css

@@ -15,6 +15,7 @@
     padding-top: 3px;
     vertical-align: baseline;
     box-shadow: 0 0 0 1px #e4e4e4;
+    height: 1.85em;
     &:disabled {
         opacity:0.5;
         cursor:initial;

assets/components/modai/js/mgr/autosummary.js

@@ -272,6 +272,7 @@ Ext.onReady(function() {
 
             imagePlus.altTextField.el.dom.style.display = 'flex';
             imagePlus.altTextField.el.dom.style.justifyItems = 'center';
+            imagePlus.altTextField.el.dom.style.alignItems = 'center';
 
             imagePlus.el.dom.parentElement.parentElement.parentElement.querySelector('label').appendChild(imageWand);
             imagePlus.altTextField.el.dom.appendChild(altTextWand);