### Summary
Fix incorrect newline handling in markdown editor when using IME input.
### Details
While composing text with an IME, pressing Enter should not trigger
markdown indentation logic.
This change skips indentation handling during composition by checking
`e.isComposing`.
This prevents unexpected line breaks and formatting issues for CJK
users.
Sometimes users want to receive email notifications of messages they create or reply to,
Added an option to personal preferences to allow users to choose
Closes#20149
* Adjust class for mobile has the problem of double small bells
* Update templates/base/head_navbar.tmpl
Co-authored-by: Gusted <williamzijl7@hotmail.com>
Co-authored-by: Gusted <williamzijl7@hotmail.com>
* Adjust template for #20069 smallbell
* Adjust notification Unread Count variable to global and count bell position with mobile
* Adjust bell icon style
* Adjust smallbell to middle
* Avoid using inline styles
* move notificationUnreadCount to a general code block, reduce changed lines
* Solved conflicts
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
Tyrone Yeh
