* All applications: Prompt user to select an action when drag and drop on lists

- Implement a generic cancel action for all drop actions on nextmatch

etemplate/js/et2_extension_nextmatch_controller.js

@@ -332,12 +332,23 @@ var et2_nextmatch_controller = et2_dataview_controller.extend(et2_IDataProvider,
 
 		var drop_action = mgr.getActionById('egw_link_drop');
 		var drag_action = mgr.getActionById('egw_link_drag');
+		var drop_cancel = mgr.getActionById('egw_cancel_drop');
 		
 		if(!this._actionLinks)
 		{
 			this._actionLinks = [];
 		}
 		
+		if (!drop_cancel)
+		{
+			// Create a generic cancel action in order to cancel drop action
+			// applied for all apps plus file and link action.
+			drop_cancel = mgr.addAction('drop', 'egw_cancel_drop', this.egw.lang('Cancel'), egw.image('cancel'), function(){},true);
+			drop_cancel.set_group('99');
+			drop_cancel.acceptedTypes = drop_cancel.acceptedTypes.concat(Object.keys(egw.user('apps')).concat(['link', 'file']));
+			this._actionLinks.push (drop_cancel.id);
+		}
+		
 		// Check if this app supports linking
 		if(!egw.link_get_registry(this.dataStorePrefix || this.egw.appName, 'query') ||
 			egw.link_get_registry(this.dataStorePrefix || this.egw.appName, 'title'))

infolog/inc/class.infolog_ui.inc.php

@@ -1249,6 +1249,7 @@ class infolog_ui
 		}
 		$actions['info_drop_mail'] = array(
 			'type' => 'drop',
+			'caption' => 'Link mail',
 			'acceptedTypes' => 'mail',
 			'onExecute' => 'javaScript:app.infolog.handle_dropped_mail',
 			'hideOnDisabled' => true