Merge branch 'add_mistake_ui' into experimental

Signed-off-by: xavieryao <xavieryao@live.cn>

Conflicts:
	src/org/papdt/miscol/ui/fragment/FragmentAddMistake0.java
修复了无法清除图片的bug

Signed-off-by: fython <fython@163.com>
Merge branch 'experimental' into mistake_detail

* experimental:
  修复了无法清除图片的bug

Signed-off-by: Harry Chen <373685963@qq.com>

Conflicts:
	src/org/papdt/miscol/ui/fragment/FragmentAddMistake0.java
	src/org/papdt/miscol/ui/fragment/FragmentCategories.java