Support Prusa Control project files (.PRUS) by the GUI.

utils/zsh/functions/_slic3r

@@ -111,7 +111,7 @@ _arguments -S \
     '--support-material-extrusion-width[specify extrusion width for support material]:support material extrusion width in mm or % of --layer-height' \
     '--bridge-flow-ratio[specify multiplier for extrusion when bridging]:bridge extrusion multiplier' \
     \
-    '*:input file:_files -g "*.(#i)(stl|obj|amf|xml)(-.)"'
+    '*:input file:_files -g "*.(#i)(stl|obj|amf|xml|prus)(-.)"'
 
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