Add a little FCP to-do list to the tickyboxes comment

To transparently tell people what exactly needs to happen in order for FCP to start. The checklist would be slightly different depending on the FCP disposition (merge, close, postpone). For merge, you would have something like:

• This MSC has one or more implementation(s), or does not need one.
• There are no open concerns.
• At least 75% of the Spec Core Team members have approved this MSC.

Existing FCP comments can be updated with this list when they are edited.

未指定文件或测试。首先跟踪创建和编辑 FCP 评论的代码，然后检查 FCP disposition 的表示方式；完成标准是 merge、close 和 postpone 评论分别获得适当的 checklist，包括更新现有评论。