Rollup merge of #33797 - alex-ozdemir:rustdoc, r=GuillaumeGomez

Changed toggle all sections key to `T`

Allows both `T` and `t`.

It had been [Shift]+[+] before.

In response to #33791.

cc @Manishearth
r? @GuillaumeGomez

Author: GuillaumeGomez

src/librustdoc/html/static/main.js

@@ -125,6 +125,7 @@
             break;
 
         case "+":
+            ev.preventDefault();
             toggleAllDocs();
             break;