Version 2.6.0

• Migrate to bgrabitmap for better handling and displaying of the presentation slides. In the future, further text effects like shadows etc. can be easily implemented.
• Redesign the multi screen presentation controller: In addition to the songs, every slide with content is listed and can be selected directly.
• Context menu of presentation window: Fullscreen and ending of presentation is now also selectable with that menu.
• Minor improvements of the song editor and full text search.
• Add "Select all Songs" under File menu in song selection.
• Bugfix: Wrong display of presentation when no specific font has been selected #24
• Bugfix: Drag and Drop exception in song selection window
• Bugfix: Wrong escaping of special characters in pptx-export
• A lot of minor bugfixes and corrections
• Translation update