Clear selection list after copy

Without this, there is a conflict with using the `-u` option (use selection).
After copying selected files, the selection is intact and if the user issues
a deletion next, the source files (meant for copying) are deleted.

nnn.1

@@ -412,7 +412,7 @@ separated by \fI;\fR:
     # codes: 0-black, 1-red, 2-green, 3-yellow, 4-blue (default), 5-magenta, 6-cyan, 7-white
     export NNN_COLORS='1234'
 
-    # xterm 256 color codes (in hex)
+    # xterm 256 color codes (in hex, 2 symbols per context)
     # codes: https://upload.wikimedia.org/wikipedia/commons/1/15/Xterm_256color_chart.svg
     export NNN_COLORS='#0a1b2c3d'
 

src/nnn.c

@@ -1999,9 +1999,8 @@ static bool cpmvrm_selection(enum action sel, char *path)
 		return FALSE;
 	}
 
-	/* Clear selection on move or delete */
-	if (sel != SEL_CP)
-		clearselection();
+	/* Clear selection */
+	clearselection();
 
 	return TRUE;
 }