+ Stack tool default size.

Backends: SDL_Renderer: Handle change to SDL_RenderGeometryRaw() function signature in SDL 2.0.19 (#4819)

Backends: Marmalade: Removed obsolete Marmalade backend (imgui_impl_marmalade.cpp) + example. (#368, #375)

Technically not much required yet but will be by extra-keys work. fix miscleared GLFW field for consistency (no effect)

Backends: OpenGL3: Using buffer orphaning + glBufferSubData(), seems to fix leaks with multi-viewports with some Intel HD drivers.. (#4468, #4504, #2981, #3381)

Menus: fixed closing a menu inside a popup/modal. Fixed menu inside a popup/modal not inhibiting hovering of items in the popup/modal. (#3496, #4797)

Fixed sub-menu items inside a popups from closing the popup (debatable).

This is actually mostly aimed at ensuring the _ChildWindow flag on menu window doesn't vary as this would cause issues with our current g.WindowsFocusOrder[] scheme

Backends: OSX: Fix keyboard support. Handle scroll cancel. Don't set mouse cursor shape unconditionally. (#4759, #4253, #1873)

Note the original FIXME: refered to GLFWs Cocoa implementation, which is largely what this commit provides.

Fix infinite loop in ImFontGlyphRangesBuilder::AddRanges if the user passes upper range = UINT16_MAX without IMGUI_USE_WCHAR32. (#4802)

Added an assertion for the common user mistake of using "" as an identifier at the root level of a window. (#1414, #2562, #2807, #4008, #4158, #4375, #4548, #4657, #4796)

  #4158, #4375, #4548, #4657, #4796)

Amend 23ef6c14. Should rework tooltip to be in a consistent position in g.Windows[]

Nav, Docking: Fix crash on dimming docked window and DockSpaceOverViewport() with PassthruCentralNode.

(amend 1dc3af38, 23ef6c14, 657073a6)

# Conflicts:
#	imgui.cpp

* Popups/modals now remain open when new windows are created from within popup/modal begin stack.
* Modals are not closed when new window appears behind active modal.
Tested by "window_popup_interruptions"

# Conflicts:
#	imgui.cpp

+ Bonus rather unorthodox coding style.

Clipper: use line size instead of cursor comparaison when range are large. (#3609, #3962 + https://github.com/ocornut/imgui_club/issues/20)

Window, Clipper: store initial precision loss and apply in clipper. (#3609, #3962 + https://github.com/ocornut/imgui_club/issues/20)

Internals: made ScrollbarEx() use ImS64 to facilitate use with larger ranges (not fully tested) + clipper tweaks (#3609, #3962 + https://github.com/ocornut/imgui_club/issues/20)

This does NOT fix all problems with large ranges and floating point precision, it merely attenuate them.

Regressed by 5ac25e7c (#4762)

Reworked modal/ctrl+tab dimming system to be entirely processed at end of the frame (backported 1dc3af38 from docking)

Fixed software mouse cursor being rendered multiple times if Render() is called more than once.

Inputs: (breaking wip) removed IsMouseTripleClicked() added recently (during 1.86 WIP), replaced with GetMouseClickedCount(). (#3229)

Backends: SDL_Renderer: Added support for large meshes (64k+ vertices) with 16-bit indices, enable 'ImGuiBackendFlags_RendererHasVtxOffset' in this backend. (#3926)

Fixed RenderRectFilledWithHole() (used by docking) + added dummy EndFrameDrawDimmedBackgrounds() stub in master.

The round corner flag change in 033dfd9d forgot to default to _None.