Mixed line terminators
The ui files use different line terminators (sometimes in the same file) - which looks confusing in diffs:
$ file src/ui/*
src/ui/chatty-dialog-info.ui: XML 1.0 document, ASCII text, with CRLF, LF line terminators
src/ui/chatty-dialog-join-muc.ui: XML 1.0 document, ASCII text, with CRLF line terminators
src/ui/chatty-dialog-muc-info.ui: XML 1.0 document, ASCII text, with CRLF line terminators
src/ui/chatty-dialog-new-chat.ui: XML 1.0 document, ASCII text, with CRLF line terminators
src/ui/chatty-dialog-settings.ui: XML 1.0 document, ASCII text, with CRLF line terminators
src/ui/chatty-dialog-welcome.ui: XML 1.0 document, ASCII text, with CRLF, LF line terminators
src/ui/chatty-message-list-popover.ui: XML 1.0 document, ASCII text
src/ui/chatty-message-list.ui: XML 1.0 document, ASCII text
src/ui/chatty-pane-msg-view.ui: XML 1.0 document, ASCII text
src/ui/chatty-window.ui: XML 1.0 document, ASCII text, with CRLF line terminators