[refactor][fix] Update reinstall logic

* Only set reinstall flag if new accept_changes file exists
* Instead of stopping highstate from running, kill all salt processes and remove their configs
* Make end of non-reinstall logs clear in cases where user cancels (and log not rotated)

setup/so-whiptail

@@ -168,8 +168,12 @@ whiptail_cancel() {
 			echo "/root/installtmp removed";
 		} >> $setup_log 2>&1
 	fi
-	exit
 
+	echo "----------" >> "$setup_log" 2>&1
+	info "User cancelled setup, no changes made."
+	echo "----------" >> "$setup_log" 2>&1
+	
+	exit
 }
 
 whiptail_check_exitstatus() {