fixes #746 password input style

assets/main.css

@@ -553,7 +553,6 @@ tbody {
   margin: 0 auto;
   display: flex;
   justify-content: center;
-  align-items: center;
   flex-direction: column;
   width: 100%;
   max-width: 640px;
@@ -632,6 +631,7 @@ tbody {
 }
 
 #delete-file {
+  align-self: center;
   width: 176px;
   height: 44px;
   background: #fff;
@@ -646,6 +646,7 @@ tbody {
 
 #deletePopup {
   position: relative;
+  align-self: center;
   bottom: 50px;
 }
 
@@ -905,7 +906,7 @@ tbody {
 }
 
 .btn-hidden {
-  visibility: hidden;
+  display: none;
 }
 
 .input-no-btn {