1.9.5: Renaming a folder shouldn't attempt to split ext

[fireattack]

When renaming a folder with a dot in it, XnView MP UI mistakenly consider the part after the dot the extension and put it in a separate input control, makes renaming confusing and inconvenient:

xnview_bug.png (24.32 KiB) Viewed 35 times

When the renaming target is a folder, it should never try to split it into stem and suffix.