version 4.0.0-beta.5

What's new:

New in 4.0.0-beta.5:

• Strings for dual channelLayout modes changed from camelCase to hyphen-separated words;
• The dual-vertical channel layout now properly displays background colors from both selected gradients;
• Fixed overlay display in dual-combined channel layout;
• Added two new built-in gradients: 'orangered' and 'steelblue'.