Loading animations for buttons

src/scss/global/_forms.scss

@@ -1,4 +1,12 @@
 
+:focus {
+	outline: none;
+}
+
+::-moz-focus-inner {
+	border: 0;
+}
+
 button,
 textarea,
 input[type="text"],
@@ -159,6 +167,36 @@ input[type="submit"] {
 		}
 	}
 
+	&.working {
+		position: relative;
+
+		&:after {
+			position: absolute;
+			display: block;
+			content: '';
+			background: $mid_grey;
+			opacity: 1;
+		    animation: slideloader 1s infinite;
+			bottom: 0;
+			left: 0;
+			right: 0;
+			height: 4px;
+			z-index: 1;
+		}
+
+		&.destructive:after {
+			background: $red;
+		}
+
+		&.primary:after {
+			background: $turquoise;
+		}
+
+		&.alternative:after {
+			background: $blue;
+		}
+	}
+
 	&.context-menu-trigger {
 		border-color: transparent;
 		padding: 6px;