console.lua: highlight the first completion suggestion before cycling

2f271a92de made it so that the first completion suggestion is
automatically selected when pressing Enter, if none was manually
selected. So automatically highlight the first completion in yellow to
show this.

player/lua/console.lua

@@ -367,7 +367,8 @@ local function format_table(list, width_max, rows_max)
                                   or '%-' .. math.min(column_widths[column], 99) .. 's'
             columns[column] = ass_escape(string.format(format_string, list[i]))
 
-            if i == selected_suggestion_index then
+            if i == selected_suggestion_index or
+               (i == 1 and selected_suggestion_index == 0) then
                 columns[column] = styles.selected_suggestion .. columns[column]
                                   .. '{\\b0}'.. styles.suggestion
             end