[Resolves Sceptre#1464] Display launch order

Akin to `sceptre delete`, display the order of operations that would
occur when issuing `sceptre launch`.

sceptre/cli/launch.py

@@ -92,12 +92,27 @@ def print_operations(self, prune: bool):
 
         dependencies = ""
         for stack in deploy_plan:
-            if stack.ignore or stack.obsolete:
-                dependencies += "{}{} **skipped{}\n".format(Fore.LIGHTWHITE_EX, stack.name, Style.RESET_ALL)
+            if stack.ignore or (stack.obsolete and not prune):
+                dependencies += "{}Skip:\t{}{}\n".format(
+                        Fore.LIGHTWHITE_EX,
+                        stack.name,
+                        Style.RESET_ALL,
+                )
+            elif stack.obsolete and prune:
+                dependencies += "{}Delete:\t{}{}\n".format(
+                        Fore.RED,
+                        stack.name,
+                        Style.RESET_ALL,
+                )
             else:
-                dependencies += "{}{}{}\n".format(Fore.YELLOW, stack.name, Style.RESET_ALL)
+                dependencies += "{}Deploy:\t{}{}\n".format(
+                        Fore.YELLOW,
+                        stack.name,
+                        Style.RESET_ALL,
+                )
 
-        print(f"The following stacks, in the following order, will be deployed:\n{dependencies}")
+        print(f"The following operations will occur, in the following order:")
+        print(dependencies)
 
     def launch(self, prune: bool) -> int:
         deploy_plan = self._create_deploy_plan()