Refactor setting the default winopts

Move filling winopts with default values to after command line options have
been parsed, not after parsing the config file. This is more intuitive.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/config.h

@@ -269,6 +269,7 @@ parse_config_libconfig(options_t *, const char *config_file, bool *shadow_enable
                        bool *fading_enable, bool *hasneg, win_option_mask_t *winopt_mask);
 #endif
 
+void set_default_winopts(options_t *, win_option_mask_t *, bool shadow_enable, bool fading_enable);
 /// Parse a configuration file is that is enabled, also initialize the winopt_mask with
 /// default values
 /// Outputs and returns: