Shift + Home/End moves cursor to the line where it was when pressing Shift

[Mingun]

I frequently use the following trick when working with a text:

• press End to move text cursor to the end of current line
• hold Shift and press Up or Down to select line(s) above or below
• still holding Shift press End to move cursor to the end or Home to move cursor to the beginning of the last selected line (which deselects it or selects the whole line depending of moving direction and key pressed)

That trick allows to select text blocks with the newline at the begin/end, usually for cut/copy. Unfortunately, in the SourceGit's commit message the cursor is moved to the line where it was at the moment of pressing of Shift button, which ruines that trick. Probably this is Avalonia bug, I don't know.