disable overscroll events where they annoy me

docs/changelog.txt

@@ -2,6 +2,8 @@ changelog
 
 -- next
 
++ Disable overscroll (pull down) refresh.
+
 + Can never seem to version the changelog correctly.
 
 -- 0.8.4

views/style.css

@@ -13,6 +13,7 @@ body {
 	word-wrap: break-word;
 	font-family: sans-serif, "Noto Color Emoji";
 	line-height: 1.2;
+	overscroll-behavior-y: contain;
 }
 pre, code {
 	white-space: pre-wrap;
@@ -67,6 +68,7 @@ header > details {
 	max-height: calc(100% - 1em);
 	overflow: auto;
 	opacity: 0.7;
+	overscroll-behavior: contain;
 }
 header > details[open] {
 	padding: 1em 1em 0em 1em;