fix min-width

src/client/styles/scss/_layout_growi.scss

@@ -27,7 +27,7 @@
     position: sticky;
     // growisubnavigation + grw-navbar-boder
     top: calc(100px + 4px);
-    min-width: 100%;
+    min-width: 260px;
     margin-top: 5px;
 
     .revision-toc-content {

src/client/styles/scss/_layout_kibela.scss

@@ -85,7 +85,7 @@ body.kibela {
     position: sticky;
     top: calc(60px + 5px);
     right: 10rem;
-    min-width: 100%;
+    min-width: 260px;
     margin-top: 40px;
 
     .revision-toc-content {