realign #only-updates filter and rename as it's not linked to prefs

manage.html

@@ -227,7 +227,7 @@
       </div>
     </div>
 
-    <label id="onlyUpdates" class="hidden">
+    <label id="only-updates" class="hidden">
       <input type="checkbox"
              data-filter=".can-update, .update-problem, .update-done"
              data-filter-hide=":not(.updatable):not(.update-done), .no-update:not(.update-problem)">

manage/import-export.js

@@ -392,8 +392,8 @@ Object.assign(document.body, {
     this.ondragend();
     if (event.dataTransfer.files.length) {
       event.preventDefault();
-      if ($('#onlyUpdates input').checked) {
-        $('#onlyUpdates input').click();
+      if ($('#only-updates input').checked) {
+        $('#only-updates input').click();
       }
       importFromFile({file: event.dataTransfer.files[0]});
     }

manage/manage.css

@@ -392,6 +392,13 @@ select {
   background-color: hsla(0, 0%, 50%, .2);
 }
 
+#only-updates {
+  position: relative;
+  left: -5px;
+  margin-top: 2px;
+  margin-bottom: 2px;
+}
+
 .checkmate {
   position: relative;
   height: 12px;

manage/updater-ui.js

@@ -108,7 +108,7 @@ function reportUpdateState(state, style, details) {
       entry.classList.add('can-update');
       entry.updatedCode = style;
       $('.update-note', entry).textContent = '';
-      $('#onlyUpdates').classList.remove('hidden');
+      $('#only-updates').classList.remove('hidden');
       break;
     case BG.updater.SKIPPED: {
       if (entry.classList.contains('can-update')) {
@@ -151,12 +151,12 @@ function reportUpdateState(state, style, details) {
 function renderUpdatesOnlyFilter({show, check} = {}) {
   const numUpdatable = $$('.can-update').length;
   const mightUpdate = numUpdatable > 0 || $('.update-problem');
-  const checkbox = $('#onlyUpdates input');
+  const checkbox = $('#only-updates input');
   show = show !== undefined ? show : mightUpdate;
   check = check !== undefined ? show && check : checkbox.checked && mightUpdate;
 
-  $('#onlyUpdates').classList.toggle('hidden', !show);
-  checkbox.checked = check;
+  $('#only-updates').classList.toggle('hidden', !show);
+  checkbox.checked = check && show;
   checkbox.dispatchEvent(new Event('change'));
 
   const btnApply = $('#apply-all-updates');