refs #19684 [finc] add aria-label for submit button on login form

* copy abstractBase login.phtml from bootstrap
* add aria-label in cataloglogin.phtml and login.phtml

themes/finc-accessibility/templates/Auth/AbstractBase/login.phtml

+<!-- finc-accessibility: auth - abstractbase - login.phtml -->
+<?php $account = $this->auth()->getManager(); ?>
+<?php $sessionInitiator = $account->getSessionInitiator($this->serverUrl($this->url('myresearch-home'))); ?>
+<?php if (!$sessionInitiator): // display default login form if no login URL provided ?>
+  <form method="post" action="<?=$this->url('myresearch-home')?>" name="loginForm" class="form-login">
+    <?=$this->auth()->getLoginFields()?>
+    <input type="hidden" name="auth_method" value="<?=$account->getAuthMethod()?>">
+    <input type="hidden" name="csrf" value="<?=$this->escapeHtmlAttr($account->getCsrfHash())?>" />
+    <div class="form-group">
+      <input class="btn btn-primary" type="submit" name="processLogin" aria-label="<?= $this->transEsc("Login-to-account") ?>" value="<?=$this->transEsc('Login')?>">
+      <?php if ($account->supportsCreation()): ?>
+        <a class="btn btn-link createAccountLink" href="<?=$this->url('myresearch-account') ?>?auth_method=<?=$account->getAuthMethod()?>"><?=$this->transEsc('Create New Account')?></a>
+      <?php endif; ?>
+      <?php if ($account->supportsRecovery()): ?>
+        <a class="btn btn-link" href="<?=$this->url('myresearch-recover') ?>?auth_method=<?=$account->getAuthMethod()?>"><?=$this->transEsc('Forgot Password')?></a>
+      <?php endif; ?>
+    </div>
+  </form>
+<?php else: ?>
+  <a href="<?=$this->escapeHtmlAttr($sessionInitiator)?>" class="btn btn-link" data-lightbox-ignore><?=$this->transEsc("Institutional Login")?></a>
+<?php endif; ?>
+<!-- finc-accessibility: auth - abstractbase - login.phtml - END -->

themes/finc/templates/myresearch/cataloglogin.phtml

@@ -37,7 +37,7 @@
       <input id="profile_cat_password" type="password" name="cat_password" value="" class="form-control" autocomplete="current-password"/>
     </div>
     <div class="form-group">
-      <input class="btn btn-primary" type="submit" name="processLogin" value="<?=$this->transEsc('Login')?>">
+      <input class="btn btn-primary" type="submit" name="processLogin" aria-label="<?= $this->transEsc("Login-to-account") ?>" value="<?=$this->transEsc('Login')?>">
     </div>
   </form>
 <?php endif; ?>