Add category done

public/sass/control-panel/_control-panel.scss

@@ -129,6 +129,13 @@
     }
 
     @import 'action-form';
+    @import 'message';
+    
+    .loading {
+        position: initial;
+
+        height: 100%;
+    }
 }
 
 @mixin normalizeButton() {

public/sass/control-panel/_message.scss

@@ -0,0 +1,24 @@
+.message {
+
+    padding: 4vh 5vw;
+
+    display: flex;
+    justify-content: center;
+    align-items: center;
+
+    @include titleFont();
+    @include titleNormalize();
+    font-size: 22pt;
+
+    color: #fff;
+    
+    &.error {
+        
+        background-color: rgb(255, 78, 78);
+    }
+
+    &.sucess {
+        
+        background-color: rgb(128, 255, 78);
+    }
+}