Update refs, better nav handling

articles/imagesharp/animatedgif.md

@@ -12,8 +12,7 @@ const int height = 100;
 const int frameDelay = 100;
 
 // For demonstration: use images with different colors.
-var colors = new Color[]
-{
+Color[] colors = {
     Color.Green,
     Color.Red
 };

ext/ImageSharp

@@ -1 +1 @@
-Subproject commit b7e348ff81187c2cb0f1958c73e0354f380337fa
+Subproject commit 259db7cf8987cb47f0cad3a0f6c5bd5f4c4bfb67

ext/ImageSharp.Web

@@ -1 +1 @@
-Subproject commit b15c4d4ef9877f3ec935b0942a703f38514a1cd8
+Subproject commit c99f07c4a412809b10324f339a35b3297b887162

templates/styles/main.css

@@ -485,6 +485,8 @@ header .navbar {
   background-color: #fff;
   border: none;
   top: 166px;
+  bottom: auto;
+  max-height: calc(100% - 166px);
   overflow-x: auto !important;
 }
 
@@ -920,24 +922,8 @@ pre code {
 .bs-docs-sidebar.affix {
   overflow-y: auto;
   overflow-x: auto;
-  height: calc(100% - 100px);
-  background: linear-gradient(#fff 30%, rgba(255, 255, 255, 0)),
-    linear-gradient(rgba(255, 255, 255, 0), #fff 70%) 0 100%,
-    radial-gradient(
-      farthest-side at 50% 0,
-      rgba(0, 0, 0, 0.24),
-      rgba(0, 0, 0, 0)
-    ),
-    radial-gradient(
-        farthest-side at 50% 100%,
-        rgba(0, 0, 0, 0.24),
-        rgba(0, 0, 0, 0)
-      )
-      0 100%;
-  background-color: #fff;
-  background-repeat: no-repeat;
-  background-attachment: local, local, scroll, scroll;
-  background-size: 100% 10px, 100% 10px, 100% 5px, 100% 5px;
+  height: fit-content;
+  max-height: calc(100% - 100px);
 }
 
 .bs-docs-sidebar.affix > ul.level1 {