Internals: rename legagy tab focus fields to TabFocusXXXX for clarity + removed one unnecessary FocusWindow() call.

Renamed is_decimal to is_floating_point.

InputText: renamed ImGuiInputTextFlags_AlwaysInsertMode to ImGuiInputTextFlags_AlwaysOverwrite. (#2863)

ImDrawFlags: rework/revert c2d6d261 + 39432bfd in a way that is closer to old version and back to opt-in but with default 0 = all corners.

Amend 0c93238a ImDrawList: upgraded AddRect(), AddRectFilled(), PathRect() to use general ImDrawFlags instead of ImDrawCornersFlags

ImDrawList: upgraded AddRect(), AddRectFilled(), PathRect() to use general ImDrawFlags instead of ImDrawCornersFlags

ImDrawList: clarified that PathArcTo()/PathArcToFast() cannot take radius < 0.0f. (#3491) + changed poor-man ceiling in _CalcCircleAutoSegmentCount() to use 0.999999f to reduce gaps

Previously it sorts of accidentally worked but would lead to counter-clockwise paths which and have an effect on anti-aliasing.

Nav: merged SetNavID() and SetNavIDWithRectRel() to improve sanity, moved flags overwrite off them. (#787)

Nav: tweaks so docking can use same code. NavRestoreLayer restore nav id but Menu key typicallys clears it for menu layer (+ less relying on _ChildWindow flag).

Nav: do not clear per-window NavId when window reappears. Process NavInit regardless of current highllight state. Consistently set g.NavLayer in SetNavID(). (#787)

As long as the item has an ID (for ID-less items will add new functionalities later.
Amend 2c3c5125

Amend sanitization of format strings. Support ' without stb_printf. Simpler loops, will also be used for ImStrv branch. (8ee77f1b) (#3604)
Widgets: Sliders: Fix a bug where numbers after format specifier (eg. %d123) would cause RoundScalarWithFormatT() return incorrect value.

Widgets: Sliders: Skip custom stb_sprintf.h format flags (', #, _) in RoundScalarWithFormatT() as they break ImAtof()/ImAtoi() and cause Drag*()/Slider*() widgets display incorrect values. (#3604)
Widgets: Sliders: Fix a bug where numbers after format specifier (eg. %d123) would cause RoundScalarWithFormatT() return incorrect value.

IsItemHovered(): fixed return value false positive when used after EndChild(), EndGroup() or widgets using either... (#3851, #1370)

...when the hovered location is located within a child window, e.g. InputTextMultiline().
This is intended to have no side effects, but brace yourself for the possible comeback..
This essentially makes IsItemHovered() not accept hover from child windows, but EndChild/EndGroup are forwarded.
More or less should fix/revert c76f0142 which was a revert of 344d48be

(amended)

ImDrawList: AddImageRounded() compare texid from cmdheader as with other functions. + Made the ImGuiMemAllocFunc / ImGuiMemFreeFunc consistent with our other typedefs (#3836)

ImSpanAllocator: Support for alignment.

Window, Nav: Fixed crash when calling SetWindowFocus(NULL) as the time a new window appears. (#3865)

Backends: DX9: Fix to support colored glyphs, using newly introduced 'TexPixelsUseColors' info. (#3369, #3844)

ImFontAtlas: Added 'bool TexPixelsUseColors' output to help backend decide of underlying texture format. (#3369, #3844)