Fix issue 14025: [DarkMode] the item lost dot line when using the mouse to expand the dropdown panel for SelectionPanelRadioButton#14710

SimonZhao888 wants to merge 2 commits into

dotnet:maindotnet/winforms:mainfrom

SimonZhao888:Fix_Issue_14025SimonZhao888/v-weidzh-winforms:Fix_Issue_14025Copy head branch name to clipboard