add option to force light icons

templates/js/script.php

@@ -5,6 +5,10 @@
     var body = $('body')
     var isTouchDevice = window.matchMedia("(pointer: coarse)").matches
 
+    <?php if ($_['force-light-icon']): ?>
+        sideMenuContainer.attr('data-forcelighticon', '1')
+    <?php endif; ?>
+
     body.on('side-menu.apps', function(e, apps) {
         <?php if ($_['hide-when-no-apps']): ?>
             sideMenu = $('#side-menu')

templates/settings/admin-form.php

@@ -82,6 +82,22 @@ $choicesSizes = [
                 type="color"
                 value="<?php print_unescaped($_['text-color']); ?>">
         </div>
+
+        <div>
+            <label for="side-menu-opener-only" class="settings-hint">
+                <?php p($l->t('Force light icons')); ?>
+            </label>
+        </div>
+
+        <div>
+            <select id="side-menu-force-light-icon" name="force-light-icon">
+                <?php foreach ($choicesYesNo as $label => $value): ?>
+                    <option value="<?php echo $value ?>" <?php if ($value === $_['force-light-icon']): ?>selected<?php endif; ?>>
+                        <?php echo $l->t($label);  ?>
+                    </option>
+                <?php endforeach; ?>
+            </select>
+        </div>
     </div>
 
     <div class="section">