Allow media upload on previz mode

inc/Spot.php

@@ -473,7 +473,7 @@ class Spot extends Main
 		$asResult = array();
 		$sDesc = '';
 
-		if($this->oProject->getMode() != Project::MODE_HISTO) {
+		if($this->oProject->isEditable()) {
 			$asMessageIds = $asMediaIds = array();
 
 			//New Feed Items
@@ -593,7 +593,7 @@ class Spot extends Main
 		$iPostId = 0;
 		$sDesc = '';
 
-        if($this->oProject->getMode() != Project::MODE_HISTO) {
+        if($this->oProject->isEditable()) {
 			$asData = array(
 				Db::getId(Project::PROJ_TABLE)	=> $this->oProject->getProjectId(),
 				'name'							=> mb_strtolower(trim($sName)),