[TASK] Don't rely on our project_base for the mainContent typoscript

Configuration/TypoScript/Frontend/setup.txt

@@ -28,7 +28,8 @@ page.headerData {
 }
 
 # content rendering information for the single news view
-lib.mainContent < styles.content.col1
+lib.mainContent < styles.content.get
+lib.mainContent.select.where = colPos=1
 
 plugin.tx_sgnews {
 	view {