DropIt v5.3

This is a release with several improvements and fixes:
- improved minor interface aspects
- added "Create Gallery" action (thanks to tpr)
- added option to decide if show the message of failed process
- added some Image abbreviations
- fixed "Rename" action issue with some folders
- fixed "Upload" action issue with some servers
- fixed interface freezing when process fails with monitored folders
- fixed issue in RegEx support
- fixed support to filter by file content for DOCX format
- fixed support to Import profiles from CSV and XLS formats
- fixed some minor bugs