Fix warning when IMGUI_DEFINE_MATH_OPERATORS is already defined by build system. (#1950)

Comments, exposed a few things in imgui_internal.h for consistency, added ImQsort wrapper.

Revert part of c7016c2 incorrectly renaming ImGuiCol_NavWindowingHighlight to ImGuiCol_NavWindowListHighlight, that was wholly unnecessary (and not documented!). (also invalidate #1939)

IsItemHovered(): Added ImGuiHoveredFlags_AllowWhenDisabled flag to query hovered status on disabled items. (#1940, #211) ...

+ shallow changelog tweaks

Fixed missing value in GetStyleColorName(). (#1939) broken with c7016c2

Internals: Extracted StartMouseMovingWindow so we can add code to turn an arbitrary widget into a window mover (will be useful to make the Collapse button a window mover past a mouse drag threshold) + added a couple of _None flags.

Internals: Fixed CalcSizeContents() returning negative value on first run (inconsequential afaik, but fixing for sanity)

Internals: Misc/shallow merge from Docking branch.

Internals: Move IMGUI_CDECL declaration to imgui_internal.h so everyone can profit.

Nav: Added a CTRL+TAB window list and changed the highlight system accordingly. (#787)

Internals: Removed RootWindowForTabbing, won't be needed. Nav: Not starting NavWindowingTarget when a modal is active (was not noticeable).

Drag and Drop: Calling BeginTooltip() between a BeginDragSource()/EndDragSource() or BeginDropTarget()/EndDropTarget() uses adjusted tooltip settings matching the one created when calling BeginDragSource() without the ImGuiDragDropFlags_SourceNoPreviewTooltip flag. (#143) + additional safety checks.

Internals: Moved selectable flags to avoid collision with public flags + rewrote some tests so we can consistently grep for (held && hovered)

Drag and Drop: Fixed ImGuiDragDropFlags_SourceNoDisableHover to affect hovering state prior to calling IsItemHovered() + fixed description. (#143)

Fix missing ImmReleaseContext in default Win32 IME handler (#1932)

Generalized d11d211e so regular popups (without the AlwaysAutoResize flag) also have a smaller minimum size, but reduced it to an arbitrary 4.0f instead of 1.0f to ease debugging of faulty situations. (#1909)

Drag and Drop: Fixed an incorrect assert when dropping a source that is submitted after the target (bug introduced with 1.62 changes related to the addition of IsItemDeactivated()). (#1875, #143)

Allow popup from ignoring the style.WindowMinSize values so short menus are not padded. (#1909) Wider generalization of b166037.

Removed per-window ImGuiWindowFlags_ResizeFromAnySide beta flag in favor `io.OptResizeWindowsFromEdges=true` to enable the feature globally. (#1495) The feature is not currently enabled by default because it is not satisfying enough.

Internals: BeginChildEx tweaks.

Examples: Comments, bits of documentation

Links and thanks. Comments on using BeginCombo/EndCombo + moved the Combo() implementations closer to each others to maximize user seeing how it is implemented from any of the secondary function body.

Internals: Settings: Simple optimization caching index into the settings buffer, to remove an unnecessary O(N*M) search during saving. (with N=active root windows during the session, M=stored settings which grows over time)

Allow menu windows from ignoring the style.WindowMinSize values so short menus are not padded. (#1909)

Double-click on resize grip doesn't need to test HoveredWindow (as button has the flattenchild flag anyway) + double-click on title bar verify that we don't have overlapping items to allow contents in title bar. + Comments

Internals: Various renaming. e.g. NewFrameUpdateHoveredWindowAndCaptureFlags() to UpdateHoveredWindowAndCaptureFlags() + exposed UpdateMovingWindow() in imgui_internal.h.

ArrowButton: Fixed to honor PushButtonRepeat() setting (and internals' ImGuiItemFlags_ButtonRepeat). Setup current line text baseline so that ArrowButton() + SameLine() + Text() are aligned properly.

Internals: Moved some of the SliderBehaviorT code into SliderBehavior to reduce the amount of instanciated code.

Version 1.63 WIP

Version 1.62