add toggle to see plain password when adding & editing ciphers (#292) (#390)

* add toggle to see plain password when adding & editing ciphers (#292)

* reduce number of password input fields to 1
while editing/creating ciphers

src/popup/less/components.less

@@ -432,6 +432,14 @@
             overflow-wrap: break-word;
         }
 
+        &.flex {
+            display: flex;
+        }
+
+        .flex-grow {
+            flex-grow: 1;
+        }
+
         input:not([type="checkbox"]), select, textarea {
             border: none;
             width: 100%;