| Viewport, Platform: Added ImGuiViewportFlags_TopMost that will be used by tooltip window (without it, clicking and holding the window emitting the tooltip would move the tooltip to the back) + GLFW backend fixes for non-win32 platforms. (#1542) | 
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| examples/imgui_impl_glfw.cpp | 
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| examples/imgui_impl_sdl2.cpp | 
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| examples/imgui_impl_win32.cpp | 
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| imgui.cpp | 
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| imgui.h | 
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