Add close action

Close #2331

src/options.go

@@ -883,6 +883,8 @@ func parseKeymap(keymap map[tui.Event][]action, str string) {
 				appendAction(actSelectAll)
 			case "deselect-all":
 				appendAction(actDeselectAll)
+			case "close":
+				appendAction(actClose)
 			case "toggle":
 				appendAction(actToggle)
 			case "down":

src/terminal.go

@@ -221,6 +221,7 @@ const (
 	actClearScreen
 	actClearQuery
 	actClearSelection
+	actClose
 	actDeleteChar
 	actDeleteCharEOF
 	actEndOfLine
@@ -2334,6 +2335,12 @@ func (t *Terminal) Loop() {
 					}
 					req(reqList, reqInfo)
 				}
+			case actClose:
+				if t.isPreviewEnabled() {
+					togglePreview(false)
+				} else {
+					req(reqQuit)
+				}
 			case actToggle:
 				if t.multi > 0 && t.merger.Length() > 0 && toggle() {
 					req(reqList)