Improve priority of folding processing when headings and super blocks are mixed

[88250]

• The super block below the folded heading contains headings of the same level and cannot be loaded #9162
• When the heading block and super block are used together, repeating content if unfolding the heading #9435
• 折叠标题后关闭再打开文档时，下方显示被折叠的超级块 #9483

标题 A 下方超级块 S 包含标题 B，这种情况下折叠 A 不应该去考虑 B 的层级是否大于 A，因为折叠 A 肯定会折叠 S，S 作为容器块包含了 B，所以 B 必然要被折叠。