Fix logo and alert in participant view

www/form/app-form.less

@@ -16,6 +16,10 @@
     color: @cryptpad_text_col;
     background-color: @cp_app-bg;
 
+    div.alert.cp-burn-after-reading {
+        margin: 10px !important;
+    }
+
     #cp-app-form-editor {
         flex: 1;
         display: flex;
@@ -84,17 +88,16 @@
         div.cp-form-view-logo {
             align-items: center;
             justify-content: center;
-            max-height: 140px;
+            font-size: 40px;
-            font-size: 50px;
             display: flex;
             font-family: "IBM Plex Mono";
             .tools_unselectable();
-            color: @cp_sidebar-hint;
+            color: @cryptpad_color_grey_500;
-            padding: 20px;
+            padding: 20px 20px 150px 20px;
             cursor: pointer;
             img {
-                max-height: 100%;
+                max-height: 60px;
-                margin-right: 20px;
+                margin: 0px 20px;
             }
         }