Remove dev help ex. for referencing INI keys

This worked when the help file was its own "application" in the main
GUI. Would be no problem to generalize, but "for the moment" just note it
like this.

resources/doc/help_dev.xml

@@ -360,7 +360,6 @@ their own simulation software. It showcases all panels and lists their options.
 		<parameter key="ENVIRONMENT_VARIABLE" type="text" default="${env:USER}">
 			<help>key=&quot;ENVIRONMENT_VARIABLE&quot; type=&quot;text&quot; size=&quot;medium&quot; default=&quot;${env:USER}&quot;</help>
 		</parameter>
-		<parameter key="INI_KEY" label="Reference another INI key:" type="text" default="${TEXT::SHORT_TEXT}"/>
 		<parameter key="FORMULA" label="Enter arithmetic expression:" type="text" size="large" default="${{pi+sin(10)}}"/>
 		<parameter key="INVALID_FORMULA" label="An invalid formula:" type="text" size="large" default="${{20+x-}}"/>
 		<parameter key="COORDINATES" type="text" default="latlon(46.81206, 9.84721)"/>
@@ -369,6 +368,9 @@ their own simulation software. It showcases all panels and lists their options.
 			<help>validate=&quot;^(\w+)(\d+)$&quot; (word plus number)</help>
 		</parameter>
 		<parameter key="PLACEHOLDER_TEXT" label="Display placholder for empty text:" type="text" placeholder="&lt;station ID&gt;"/>
+		<parameter type="helptext" wrap="true" section="Text">
+			<help>One more "expression" can be checked: INI key names of the opened application: &lt;i&gt;${SECTION::KEY_NAME}&lt;/i&gt;</help>
+		</parameter>
 	</frame>
 
 	<!-- FILE INPUT -->