Improved dragging.
UITab now supports close button and proper close control (user can deny the close request).
UITabWidget now allows to rearrange the tabs in the tab bar.
Fixed UISceneNode size, now it's set in pixels instead of dp to allow to always be the same size as the window.
Fixed styles and layouts not updating in time before calling draw.
Fixed a double delete crash when using UIDropDownList and UIWinMenu.
Now UI elements can be dragged even if the mouse cursor goes out of the window limits.
UIScrollBar slider now can be dragged also from the horizontal edges that are not part of the button slider (this allows to scroll from the edge for example in maximized windows).
Fixed TextDocument on emscripten.
Disabled fullscreen window minimizing on focus loss (SDL_HINT_VIDEO_MINIMIZE_ON_FOCUS_LOSS).
Moved the global test to tests/test_all.
Added a ui_perf_test used to test specific performance issues in the UI.
Fixed the element/widget inline style (now respects the specificity).
Some optimizations in UIListBox.
UITabWidget now acts as a draw invalidator, skipping the draw invalidation if the element invalidating is not visible in the current tab.
premake5 file now supports different architectures.
Updated README.md and docs.
Minor fixes in UIColorPicker.
Updated SOIL2 and efsw.
Added LICENSE file.
Added new markdown document with the UI Basics explanation.
Fixed some minor bugs in UIPushButton.
Added new Event: OnFontStyleChanged.
--HG--
branch : dev
