changed content-wrapper calc() from % to vh & added content-wrapper calc() with collapsed header

dist/css/AdminLTE.css

@@ -87,10 +87,15 @@ body {
   }
 }
 .content-wrapper {
-  min-height: calc(100% - 102px);
+  min-height: calc(100vh - 101px);
   background-color: #ecf0f5;
   z-index: 800;
 }
+@media (max-width: 767px) {
+  .content-wrapper {
+    min-height: calc(100vh - 151px);
+  }
+}
 .main-footer {
   background: #fff;
   padding: 15px;

dist/css/alt/AdminLTE-without-plugins.css

@@ -88,10 +88,15 @@ body {
   }
 }
 .content-wrapper {
-  min-height: calc(100% - 102px);
+  min-height: calc(100vh - 101px);
   background-color: #ecf0f5;
   z-index: 800;
 }
+@media (max-width: 767px) {
+  .content-wrapper {
+    min-height: calc(100vh - 151px);
+  }
+}
 .main-footer {
   background: #fff;
   padding: 15px;