Docking: Maintain CentralNode. When SetNextWindowDockID() on a now split node id, we dig to find the central node or the last focused node. (#2109)

Docking: Comments + maiintain LastFrameFocused per node + using bitfiield for docking bools.

Docking: Added internal DockBuilderGetCentralNode(). Fixed being unable to undock whole node from dock button in DockSpace with a central node. (#2109)

Docking: Added ImGuiDockNodeFlags_NoResize. (#2109)

Merge branch 'viewport' into docking ...

# Conflicts:
#	imgui.cpp

Viewport: Merging fixes + relying on multiple viewport overlaps. Follow-up to previous attempts are reworking the split/merge mechanisms. (#1542)

Docking: Hidden tab-bar triangle reflects focus but using Button colors. (#2109)

Docking: Fixed double-overlay when dragging window over one of the (four cardinal) outer drop boxes. (#2109)

Docking: Added context menu option to hide the tab bar of single-window dock nodes, similar to Unreal. (#2109)

Viewport: Fixes moving child menu viewport (fix 379733a).

Viewport: Fixes moving child menu viewport (fix 379733a).

Merge branch 'viewport' into docking ...

# Conflicts:
#	docs/CHANGELOG.txt
#	imgui.cpp
#	imgui_internal.h

Merge branch 'master' into viewport ...

# Conflicts:
#	examples/imgui_impl_sdl.cpp

Viewport: Fix viewport regression with protruding child window creating their own viewport. (fixes cae4d02, 760c1d95) (#1542)

Docking: Added ImGuiConfigFlags_DockingNoSplit flag. (#2109)

Viewport: Added support for minimized window which caused problem when ImGuiBackendFlags_HasMouseHoveredViewport was not supported. (#1542) + todo

Viewport: Avoid unnecessary reapplying platform pos/size every frame. (#2205) + Fix GLFW ImGui_ImplGlfw_CreateWindow() from not applying position immediately. Clear LastNameHash properly (bug already fixed in Docking branch)

Viewport: Merging/Extracting to/from main host viewport is now performed based on current state rather than triggers. Windows which don't fit in host window are now consistently in their own viewport. Toward simplifying the UpdateSelectWindowViewport() function. Probably broke something.. (#1542)

Viewport: UpdateTryMergeWindowIntoHostViewport() calls BringWindowToDisplayFront() - possible now that BringWindowToFocusFront() is a different function.

Viewport: Merging/Extracting to/from main host viewport is now performed based on current state rather than triggers. Windows which don't fit in host window are now consistently in their own viewport. Toward simplifying the UpdateSelectWindowViewport() function. Probably broke something.. (#1542)

Viewport: UpdateTryMergeWindowIntoHostViewport() calls BringWindowToDisplayFront() - possible now that BringWindowToFocusFront() is a different function.

Version 1.67 WIP

Viewport: Stop relying on viewport->CreatedPlatformWindow to create Platform_DestroyWindow and Renderer_DestroyWindow. Explicitly require Platform_GetWindowFocus() to require supporting empty data.

Merge branch 'viewport' into docking ...

# Conflicts:
#	docs/CHANGELOG.txt
#	imgui_widgets.cpp

Merge branch 'master' into viewport ...

# Conflicts:
#	imgui.cpp

Version 1.66

Nav: Fixed explicit directional input not re-highlighting current nav item if there is a single item in the window and highlight has been previously disabled by the mouse. (#787)

Internals: Using GetOverlayDrawList(ImGuiWindow*) to match syntax of viewport/master branches. Fixed compiling with IMGUI_DEBUG_NAV_RECTS

Removed unnecessary ImGui:: prefixes.

Internals: Added FindWindowByID() helper. (#2190)