Remove `position: absolute` from #p-logo element

This was inherited from Monobook (r2881, b52a2a1567).

The #mw-panel (sidebar) was at `top: 160px`.
The #p-logo was at `top: -160px`.
This looks hacky so I set #mw-panel `top: 0`.

Bug: T170053
Change-Id: Ifb99ff36e3a9c530c944df2ea0a6c75759045c1c

components/navigation.less

@@ -60,9 +60,6 @@ div#mw-head {
 
 /* Logo */
 #p-logo {
-	position: absolute;
-	top: -160px;
-	left: 0;
 	width: 10em;
 	height: 160px;
 
@@ -80,8 +77,7 @@ div#mw-head {
 div#mw-panel {
 	font-size: @menu-main-font-size;
 	position: absolute;
-	top: 160px;
-	padding-top: 1em;
+	top: 0;
 	width: 10em;
 	left: 0;
 
@@ -135,7 +131,7 @@ div#mw-panel {
 	/* First sidebar portlet. Not using :first-of-type for IE<=8 support. */
 	#p-logo + div.portal {
 		background-image: none;
-		margin-top: 0;
+		margin-top: 1em;
 		h3 {
 			display: none;
 		}

screen-hd.less

@@ -6,9 +6,6 @@
 	margin-left: 11em;
 	padding: 1.25em 1.5em 1.5em 1.5em;
 }
-#p-logo {
-	left: @menu-main-logo-left;
-}
 div#footer {
 	margin-left: 11em;
 	padding: 1.25em;

variables.less

@@ -33,7 +33,5 @@
 @menu-main-body-margin-left: 0.5em;
 @menu-main-body-padding: 0.3em 0 0 0;
 
-@menu-main-logo-left: 0.5em;
-
 // Personal menu
 @menu-personal-font-size: 0.75em;