DropIt v7.0

This is a major release with several improvements and fixes. This is the complete list of changes:
- improved "Associations" and "Profiles" windows (position is saved)
- improved "Compress" action to rename compressed files if they are duplicates in the archive
- improved "Progress" window (position, size and columns are saved)
- improved "Select Action" window (associations are in alphabetical order)
- improved filters by file content (now with 6 alternatives)
- improved option to skip files if in use (e.g. during download)
- improved PDF files generated with "Create List" action
- improved support to gradually hide target image
- improved support to move files with "Rename" action
- added "??" and "? ?" modifiers to alternate upper and lower characters
- added "a>(s1,d1)" and "a<(s1,d1)" modifiers to insert a string in a defined position
- added "lz(d1)" modifier to fill strings with leading zeros
- added creation of profile examples at the first DropIt run (new installations only)
- added option to create the automatic backup every 3 days (enabled by default)
- added some "Paths" and "Images" abbreviations
- added some profile examples (available from right-click context menu of "Customize Profiles")
- added some rule examples for common file formats (Documents, Music, Videos...)
- added support to alert with a sound when the "Select Action" window appears (read 4.4 of the Guide)
- added support to create archives with any extension (regardless of the compression format)
- added support to define the name of DropIt SendTo links (read 4.4 of the Guide)
- added support to define the speed to gradually hide target image (read 4.4 of the Guide)
- added support to define the time before gradually hide target image (read 4.4 of the Guide)
- added support to enable/disable associations with Ctrl + click (in "Manage Associations" window)
- added support to press "Alt" key while folders are dropped on to remove them as Monitored Folders
- added support to run a command line at the end of the process (read 4.4 of the Guide)
- added support to use profile icons in SendTo menu (read 4.4 of the Guide)
- removed More/Less button from "Progress" window (total freedom of window resizing)
- removed option to "Show list of loaded files by default" (no longer needed)
- fixed %Counter% abbreviation within "Rename" action
- fixed automatic language detection at the first DropIt run
- fixed button to open files/folders from %UserInput% window
- fixed support to multiple monitors
- fixed support to skip files/folders if %UserInput% value is not defined
- fixed some minor bugs