Fix the status module builder and tests

tests/application_module_expected.txt

@@ -1 +1 @@
-E:@catppuccin_status_application #[fg=#f5c2e7,bg=default,nobold,nounderscore,noitalics]#[fg=#11111b,bg=#f5c2e7] #[fg=#cdd6f4,bg=#45475a,nobold] <application>#[fg=#45475a,bg=default]█
+E:@catppuccin_status_application #[fg=#f5c2e7,nobold,nounderscore,noitalics]#[fg=#11111b,bg=#f5c2e7] #[fg=#f5c2e7,bg=#45475a]#[fg=#cdd6f4] <application>#[fg=#45475a]█

utils/status_module.conf

@@ -1,14 +1,20 @@
 # vim:set ft=tmux:
 
-set -gqF @_ctp_connect_color_bg "#{?#{==:#{@catppuccin_status_connect_separator},yes},,bg=default}"
+# Embedded style that ensures that modules look "connected"
+# when required.
+set -gqF @_ctp_connect_style \
+  "#{?#{==:#{@catppuccin_status_connect_separator},yes},,#[bg=default]}"
 
 set -gF "@catppuccin_status_${MODULE_NAME}" \
-  "#[fg=#{@catppuccin_${MODULE_NAME}_color},#{@_ctp_connect_color_bg},nobold,nounderscore,noitalics]#{@catppuccin_status_left_separator}"
+  "#[fg=#{@catppuccin_${MODULE_NAME}_color},nobold,nounderscore,noitalics]#{@_ctp_connect_style}#{@catppuccin_status_left_separator}"
 
 set -agF "@catppuccin_status_${MODULE_NAME}" \
     "#[fg=#{@thm_crust},bg=#{@catppuccin_${MODULE_NAME}_color}]#{@catppuccin_${MODULE_NAME}_icon}"
 
 set -agF "@catppuccin_status_${MODULE_NAME}" "#[fg=#{@catppuccin_${MODULE_NAME}_color},"
+
+# If _only_ the icon should be filled in, then change the background
+# to surface_1, and the foreground to crust. Otherwise leave the formatting as-is.
 %if "#{==:#{@catppuccin_status_fill},icon}"
   set -agF "@catppuccin_status_${MODULE_NAME}" "bg=#{@thm_surface_1}]#{@catppuccin_status_middle_separator}#[fg=#{@thm_fg}] "
 %else
@@ -23,6 +29,6 @@ set -agF "@catppuccin_status_${MODULE_NAME}" "#{@catppuccin_${MODULE_NAME}_text}
   set -agF "@catppuccin_status_${MODULE_NAME}" "#[fg=#{@catppuccin_${MODULE_NAME}_color}]"
 %endif
 
-set -agF "@catppuccin_status_${MODULE_NAME}" "#[#{@_ctp_connect_color_bg}]#{@catppuccin_status_right_separator}"
+set -agF "@catppuccin_status_${MODULE_NAME}" "#{@_ctp_connect_style}#{@catppuccin_status_right_separator}"
 
-set -ug @_ctp_connect_color_bg
+set -ug @_ctp_connect_style