Scroll support for unit testing (#3231)

Addressing unit testing scrolling regression.

packages/insomnia-app/app/ui/css/components/unit-tests.less

@@ -1,5 +1,6 @@
 .unit-tests {
   height: 100%;
+  overflow-y: auto;
 
   .editor {
     overflow-y: hidden !important;
@@ -7,6 +8,11 @@
     margin: var(--padding-sm) 0 var(--padding-md) 0;
   }
 
+  &__sidebar, &__results {
+    overflow-y: auto;
+    height:100%;
+  }
+
   &__sidebar {
     display: flex;
     flex-direction: column;

packages/insomnia-app/app/ui/css/components/wrapper.less

@@ -93,28 +93,25 @@
     }
   }
 
-  .pane-one {
+  .pane-one, .pane-two {
     min-width: 0;
-    grid-column-start: 4;
-    grid-row-start: 2;
-    grid-row-end: span 3;
+    max-height:100%;
     background: inherit;
-
     border-left: 1px solid var(--hl-md);
     background: var(--color-bg);
     color: var(--color-font);
   }
 
+  .pane-one {
+    grid-column-start: 4;
+    grid-row-start: 2;
+    grid-row-end: span 3;
+  }
+
   .pane-two {
-    min-width: 0;
     grid-column-start: 6;
     grid-row-start: 2;
     grid-row-end: span 3;
-    background: inherit;
-
-    border-left: 1px solid var(--hl-md);
-    background: var(--color-bg);
-    color: var(--color-font);
   }
 
   .app-header {