Corrections de bugs

• The drop-down list option 'Show Numeric Values for Items' in the Edit Variable dialog had no effect
• The data length of the Transmit messages created with the 'Transmit' > 'Load Send Symbols' command was not correctly initialized for symbols that are valid for all data lengths
• Fixed an issue with drag-and-drop in the Project Manager window
• Hex color codes in the Properties Window were shown in the wrong order b-g-r instead of r-g-b
• Some other minor bug fixes and improvements