style password checkbox

app/templates/uploadPassword.js

@@ -4,11 +4,11 @@ module.exports = function(state, emit) {
   const file = state.storage.getFileById(state.params.id);
   const div = html`
   <div class="selectPassword">
-    <div>
+    <div id="addPasswordWrapper">
       <input id="addPassword" type="checkbox" onchange=${togglePasswordInput}/>
-      <label for="addPassword">${state.translate(
-        'requirePasswordCheckbox'
-      )}</label>
+      <label for="addPassword">
+        <img src="/assets/check-16-blue.svg"/>
+        ${state.translate('requirePasswordCheckbox')}</label>
     </div>
     <form class="setPassword hidden" onsubmit=${setPassword}>
       <input id="unlock-input"

assets/check-16-blue.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path fill="#0A84FF " d="M6 14a1 1 0 0 1-.707-.293l-3-3a1 1 0 0 1 1.414-1.414l2.157 2.157 6.316-9.023a1 1 0 0 1 1.639 1.146l-7 10a1 1 0 0 1-.732.427A.863.863 0 0 1 6 14z"/></svg>

assets/main.css

@@ -896,6 +896,50 @@ tbody {
   margin-bottom: -5px;
 }
 
+#addPasswordWrapper {
+  height: 24px;
+}
+
+#addPassword {
+  position: absolute;
+  visibility: collapse;
+}
+
+#addPasswordWrapper label {
+  line-height: 20px;
+  cursor: pointer;
+  position: relative;
+  opacity: 0.6;
+}
+
+#addPassword:checked + label {
+  opacity: 1;
+}
+
+#addPasswordWrapper label::after {
+  content: '';
+  height: 20px;
+  width: 20px;
+  margin-right: 10px;
+  margin-left: 5px;
+  float: left;
+  border: 1px solid rgba(12, 12, 13, 0.3);
+  border-radius: 2px;
+}
+
+#addPassword:not(:checked) + label > img {
+  height: 0;
+  width: 0;
+}
+
+#addPassword:checked + label > img {
+  height: 20px;
+  width: 20px;
+  position: absolute;
+  left: -29px;
+  top: 2px;
+}
+
 @media (max-device-width: 992px), (max-width: 992px) {
   .popup .popuptext {
     left: auto;

public/locales/en-US/send.ftl

@@ -85,5 +85,5 @@ footerLinkPrivacy = Privacy
 footerLinkTerms = Terms
 footerLinkCookies = Cookies
 requirePasswordCheckbox = Require a password to download this file
-addPasswordButton = Add Password
-incorrectPassword = Incorrect password. Try again?
+addPasswordButton = Add password
+passwordTryAgain = Incorrect password. Try again.