Add key commands for history

src/excmds_background.ts

@@ -72,6 +72,10 @@ namespace ExCmds {
     }
     export function tabprev(increment = 1) { tabnext(increment*-1) }
 
+    // History functions
+    export function history(n = 1) {messageActiveTab("history",[n])}
+    export function historyback(n = 1) {history(n*-1)}
+    export function historyforward(n = 1) {history(n)}
 
     // Misc functions
     export function focuscmdline() { messageActiveTab("focuscmdline") }

src/parsing.ts

@@ -12,6 +12,8 @@ namespace Parsing {
         const nmaps = new Map<string, string>([
             ["t", "tabopen"],
             ["j", "scrolldownline"],
+            ["H", "historyback"],
+            ["L", "historyforward"],
             ["k", "scrollupline"],
             ["gt", "tabnext"],
             ["gT", "tabprev"],