Custom Logo for Login and Top Left Corner. Optional link when clicking logo. Settings at Admin Panel / Layout.

Thanks to xet7 !

Fixes #1493,
fixes #2721,
fixes #2681,
fixes #1583,
fixes #1196,
fixes #336,
fixes wekan/wekan-snap#130

client/components/main/header.jade

@@ -19,6 +19,19 @@ template(name="header")
                   = title
         #header-new-board-icon
       else
+        //-
+          On sandstorm, the logo shouldn't be clickable, because we only have one
+          page/document on it, and we don't want to see the home page containing
+          the list of all boards.
+        unless currentSetting.hideLogo
+          if currentSetting.customTopLeftCornerLogoImageUrl
+            if currentSetting.customTopLeftCornerLogoTargetUrl
+              a(href="{{currentSetting.customTopLeftCornerLogoTargetUrl}}")
+                img(src="{{currentSetting.customTopLeftCornerLogoImageUrl}}" height="27" width="auto" margin="0" padding="0")
+            unless currentSetting.customTopLeftCornerLogoTargetUrl
+              img(src="{{currentSetting.customTopLeftCornerLogoImageUrl}}" height="27" width="auto" margin="0" padding="0")
+          unless currentSetting.customTopLeftCornerLogoImageUrl
+            img(src="{{pathFor '/logo-header.png'}}" alt="")
         ul
           li
             a(href="{{pathFor 'home'}}")
@@ -52,17 +65,6 @@ template(name="header")
     #header-main-bar(class="{{#if wrappedHeader}}wrapper{{/if}}")
       +Template.dynamic(template=headerBar)
 
-      //unless hideLogo
-
-        //-
-          On sandstorm, the logo shouldn't be clickable, because we only have one
-          page/document on it, and we don't want to see the home page containing
-          the list of all boards.
-
-      //  unless currentSetting.hideLogo
-      //    a.wekan-logo(href="{{pathFor 'home'}}" title="{{_ 'header-logo-title'}}")
-      //    img(src="{{pathFor '/logo-header.png'}}" alt="")
-
   if appIsOffline
     +offlineWarning