Added second HTTP Header field

NB. Need to update the translations in Github actions again.

resources/settings/properties.xml

@@ -111,18 +111,36 @@
   <property id="battery_level_refresh_rate" type="number">15</property>
 
   <!--
+    Header 1:
     A user specified HTTP header name to be used in all HTTP requests.
     This is useful for some Home Assistant installations that require a
     custom HTTP header.
   -->
-  <property id="user_http_header_name" type="string"></property>
+  <property id="user_http_header1_name" type="string"></property>
 
   <!--
+    Header 1:
     A user specified HTTP header value to be used in all HTTP requests.
     This is useful for some Home Assistant installations that require a
     custom HTTP header.
   -->
-  <property id="user_http_header_value" type="string"></property>
+  <property id="user_http_header1_value" type="string"></property>
+
+  <!--
+    Header 2:
+    A user specified HTTP header name to be used in all HTTP requests.
+    This is useful for some Home Assistant installations that require a
+    custom HTTP header.
+  -->
+  <property id="user_http_header2_name" type="string"></property>
+
+  <!--
+    Header 2:
+    A user specified HTTP header value to be used in all HTTP requests.
+    This is useful for some Home Assistant installations that require a
+    custom HTTP header.
+  -->
+  <property id="user_http_header2_value" type="string"></property>
 
   <!--
     Clear the Webhook ID on next application start, and reauthenticate,

resources/settings/settings.xml

@@ -124,18 +124,37 @@
     <settingConfig type="numeric" min="5" />
   </setting>
 
-  <setting
-    propertyKey="@Properties.user_http_header_name"
-    title="@Strings.SettingsUserHttpHeaderName"
+  <group
+    id="HttpHeader"
+    title="@Strings.SettingsUserHttpHeader"
+    description="@Strings.SettingsUserHttpHeaderDescription"
   >
-    <settingConfig type="alphaNumeric" />
-  </setting>
-  <setting
-    propertyKey="@Properties.user_http_header_value"
-    title="@Strings.SettingsUserHttpHeaderValue"
-  >
-    <settingConfig type="alphaNumeric" />
-  </setting>
+    <setting
+      propertyKey="@Properties.user_http_header1_name"
+      title="@Strings.SettingsUserHttpHeader1Name"
+    >
+      <settingConfig type="alphaNumeric" />
+    </setting>
+    <setting
+      propertyKey="@Properties.user_http_header1_value"
+      title="@Strings.SettingsUserHttpHeader1Value"
+    >
+      <settingConfig type="alphaNumeric" />
+    </setting>
+
+    <setting
+      propertyKey="@Properties.user_http_header2_name"
+      title="@Strings.SettingsUserHttpHeader2Name"
+    >
+      <settingConfig type="alphaNumeric" />
+    </setting>
+    <setting
+      propertyKey="@Properties.user_http_header2_value"
+      title="@Strings.SettingsUserHttpHeader2Value"
+    >
+      <settingConfig type="alphaNumeric" />
+    </setting>
+  </group>
 
   <setting
     propertyKey="@Properties.clear_webhook_id"