fix: remove absolute from cover and remove margins, fixes https://github.com/NodeBB/NodeBB/issues/7969

less/account.less

@@ -33,7 +33,6 @@
 		background-origin: content-box;
 		width: 100%;
 		top: 50px;
-		position: absolute;
 		left: auto;
 		right: 0px;
 
@@ -154,8 +153,6 @@
 		}
 	}
 
-	margin-top: 200px;
-
 	.container {
 		height: 200px;
 		position: relative;
@@ -167,8 +164,6 @@
 	}
 
 	@media (min-width: @screen-md-min) {
-		margin-top: 300px;
-
 		.cover,  .container {
 			height: 300px;
 

less/mobile.less

@@ -25,8 +25,6 @@
 	}
 
 	.account {
-		margin-top: 256px;
-
 		.cover .controls i {
 			font-size: 3em;
 		}