Restore cursor using normal capability

- Looks like some infocmp capabilities for making cursor visible
  using cvvis doesn't always work. So change to use cnorm instead.
- Terminal instruction of making cursor very visible with cvvis
  doesn't mean cursor should be visible, afaik, so i.e. screen
  or tmux didn't work.
- Fixes #970

Author: jvalkeal

spring-shell-core/src/main/java/org/springframework/shell/component/support/AbstractComponent.java

@@ -294,7 +294,7 @@ protected void loop(ComponentContext<?> context) {
 		finally {
 			terminal.setAttributes(attr);
 			terminal.puts(Capability.keypad_local);
-			terminal.puts(Capability.cursor_visible);
+			terminal.puts(Capability.cursor_normal);
 			display.update(Collections.emptyList(), 0);
 		}
 	}

spring-shell-core/src/main/java/org/springframework/shell/component/view/TerminalUI.java

@@ -283,7 +283,7 @@ private void display() {
 
 		int targetCursorPos = 0;
 		if (virtualDisplay.isShowCursor()) {
-			terminal.puts(Capability.cursor_visible);
+			terminal.puts(Capability.cursor_normal);
 			targetCursorPos = size.cursorPos(virtualDisplay.getCursorPosition().y(), virtualDisplay.getCursorPosition().x());
 			log.debug("Display targetCursorPos {}", targetCursorPos);
 		}
@@ -402,7 +402,7 @@ private void loop() {
 			eventLoop.destroy();
 			terminal.setAttributes(attr);
 			log.debug("Setting cursor visible");
-			terminal.puts(Capability.cursor_visible);
+			terminal.puts(Capability.cursor_normal);
 			if (fullScreen) {
 				display.update(Collections.emptyList(), 0);
 			}