Windows applied with the UI theme have modern-looking 2D borders, however, the default border (1-pixel wide) makes it very difficult to grab and resize the window.
Now the border is re-designed to increase the size of grab area without changing the size and look of borders.
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For MDI sheets
When border = 1 (default value), border <= 0, or border > 8 (pixels), the border line will always be 1-pixel wide, and the grab area will be increased from 1-pixel wide to 4-pixel wide.
When border >= 2 and <= 8, the border line will always be 1-pixel wide, while the grab area will use the specified number as the width (for example, when border = 3, then the border line will be 1-pixel wide and the grab area will be 3-pixel wide).
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For other windows
When border = 1 (default value), border <= 0, or border > 8 (pixels), the border line will always be 1-pixel wide, and the grab area will be increased from 1-pixel wide to 6-pixel wide.
When border >= 2 and <= 8, the border line will always be 1-pixel wide, while the grab area will use the specified number as the width (for example, when border = 3, then the border line will be 1-pixel wide and the grab area will be 3-pixel wide).
Two new system themes are added (there are six system themes now):
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Flat Design Lime -- this theme is similar to Flat Design Blue, but with a green color scheme. The controls are designed in a flat, simplistic style, and feature a green color in their default state. The interface will have a clean and modern look, with all elements being easily distinguishable and visually appealing.
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Flat Design Orange -- this theme is similar to Flat Design Blue, but with an orange color scheme. The controls are flattened and feature an orange color in their default state. The interface will have a warm and inviting feel, with clear contrast between different elements.
