Fix dark on dark contact icons

customize.dist/src/less2/include/messenger.less

@@ -94,6 +94,7 @@
                 flex-flow: column;
                 flex: 1;
                 min-width: 0;
+                color: @colortheme_base;
                 .cp-app-contacts-name {
                     white-space: nowrap;
                 }
@@ -113,7 +114,7 @@
             width: 20px;
             text-align: center;
             &:hover {
-                color: darken(@msg-color, 20%);
+                color: @cryptpad_text_col;
             }
         }