Merge branch 'dev' (0.3.7 features) into 'master'

功能改进：
* 支持分站点的页面缩放设置。
* 广告过滤支持Adblock Edge。

Bug修复：
* 解决部分网页刷新后元素隐藏规则失效的问题。
* 解决切换标签页后无法用上下键滚动页面的问题。

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Enhancements:
* Support per-site zooming.
* Support Adblock Edge.

Bug fixes:
* Fix the bug that element hiding rules are not applied after refreshing the page.
* You can now scroll the page using up/down arrow keys after switching tabs.