Set webmail theme from web ui

src/freedombone-installer

@@ -151,6 +151,15 @@ function web_admin_background_color {
             sed -i "0,/ color:.*/s// color: ${fg_color};/" "$webfile"
         fi
     done
+
+    # change webmail theme
+    if [ -f "/var/www/${local_hostname}/htdocs/mail/config/config.php" ]; then
+        if [[ "$bg_color" == 'white' ]]; then
+            sed -i 's|theme_default.*|theme_default = 54;|g' "/var/www/${local_hostname}/htdocs/mail/config/config.php"
+        else
+            sed -i 's|theme_default.*|theme_default = 55;|g' "/var/www/${local_hostname}/htdocs/mail/config/config.php"
+        fi
+    fi
 }
 
 function web_admin_create_app_descriptions {

src/freedombone-utils-webadmin

@@ -52,6 +52,15 @@ function web_admin_background_color {
             sed -i "0,/ color:.*/s// color: ${fg_color};/" "$webfile"
         fi
     done
+
+    # change webmail theme
+    if [ -f "/var/www/${local_hostname}/htdocs/mail/config/config.php" ]; then
+        if [[ "$bg_color" == 'white' ]]; then
+            sed -i 's|theme_default.*|theme_default = 54;|g' "/var/www/${local_hostname}/htdocs/mail/config/config.php"
+        else
+            sed -i 's|theme_default.*|theme_default = 55;|g' "/var/www/${local_hostname}/htdocs/mail/config/config.php"
+        fi
+    fi
 }
 
 function web_admin_translate_text {