Use SE icon for "Adust all lines" dialog

[KoalaBear84]

Just a small improvement, and if there are no other icons also quick to fix.

As I don't see an easy way to check if the assigned icon is the default Windows Forms icon, I can only use the default icon for all. And if there is no other icons used, this might be OK. Else we need to find a better way. It's better to reuse the resources.

UiUtil.cs

internal static void PreInitialize(Form form)
{
    form.AutoScaleMode = AutoScaleMode.Dpi;
    form.Font = GetDefaultFont();

    form.Icon = Properties.Resources.SEIcon;
}

Before:

Afer: