NegPy 0.17.2

• Fix: batch normalization and batch export progress bars now properly updates on status bar.
• Fix: export filename templating now preserves original_name verbatim — dashes, spaces, and multiple/leading/trailing underscores in the original filename are no longer mangled by the cleanup pass.
• Changed default export filename pattern from positive_{{ original_name }} to {{ original_name }}.
• Changed default export colorspace to be Same as source (detected from input file).
• UX: Status bar - replaced zoom % and resolution (shown elsewhere) with a file position counter (3 / 12) for batch workflows.