TXT format export: file extension property

plugins/org.jkiss.dbeaver.data.transfer/OSGI-INF/l10n/bundle.properties

@@ -82,6 +82,7 @@ dataTransfer.processor.xml.property.format.label = Dates/numbers format
 dataTransfer.processor.txt.name=TXT
 dataTransfer.processor.txt.description=Export to plain text format
 dataTransfer.processor.txt.propertyGroup.general.label = General
+dataTransfer.processor.txt.property.extension.label = File extension
 dataTransfer.processor.txt.property.maxColumnLength.label = Max column length
 dataTransfer.processor.txt.property.showNulls.label = Show NULLs
 dataTransfer.processor.txt.property.delimLeading.label = Show leading delimiter

plugins/org.jkiss.dbeaver.data.transfer/plugin.xml

@@ -227,6 +227,7 @@
                     icon="platform:/plugin/org.jkiss.dbeaver.model/icons/types/text.png"
                     label="%dataTransfer.processor.txt.name">
                 <propertyGroup label="%dataTransfer.processor.txt.propertyGroup.general.label">
+                    <property id="extension" label="%dataTransfer.processor.txt.property.extension.label" type="string" defaultValue="txt"/>
                     <property id="maxColumnLength" label="%dataTransfer.processor.txt.property.maxColumnLength.label" defaultValue="100"/>
                     <property id="showNulls" label="%dataTransfer.processor.txt.property.showNulls.label" type="boolean" defaultValue="false"/>
                     <property id="delimLeading" label="%dataTransfer.processor.txt.property.delimLeading.label" type="boolean" defaultValue="true"/>