Fix DragScalar for unsigned types (#2780) ...

decreasing the value was broken on arm64

Backends: OpenGL3: Tweaked initialization code allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before ImGui_ImplOpenGL3_NewFrame() if for some reason they wanted.

Fixed missing IMGUI_API for IsMouseDragPastThreshold().

ColorEdit: Disable Hue edit when Saturation==0 instead of letting Hue values jump around.

DragInt, DragFloat, DragScalar: Using (v_min > v_max) allows locking any edit to the value.

TabBar: feed desired width (sum of unclipped tabs width) into layout system to allow for auto-resize. (#2768) ...

Before 1.71 tab bars fed the sum of current width which created feedback loops in certain situations. Amend f95c77e.

TabBar: improved shrinking for large number of tabs to avoid leaving extraneous space on the right side. Individuals tabs are given integer-rounded width and remainder is spread between tabs left-to-right.

Disable with ConfigWindowsMemoryCompactTimer < 0.0f (#2636)

Added a mechanism to compact/free the larger allocations of unused windows (buffers are compacted when a window is unused for 60 seconds, as per io.ConfigWindowsMemoryCompactTimer = 60.0f). Note that memory usage has never been reported as a problem, so this is merely a touch of overzealous luxury. (#2636)

Demo: PlotLine example displays the average value. (#2759) + extra comments

SliderScalar: Improved assert when using U32 or U64 types with a large v_max value. (#2765) ...

+  misc minor stuff.

Rebased imstb_rectpack on stb_rect_pack v1.00.

Internals: Storing settings using ImVec2ih to match what we are doing with dock node. + removed ImMax from reading Size value (done in Begin) + removed seemingly unnecessary FLT_MAX compare in SettingsHandlerWindow_WriteAll. ...

About: Added backquote to text copied into clipboard so it doesn't mess up with github formatting when pasted.

ImDrawList: clarified the name of many parameters so reading the code is a little easier. (#2740)

Using offsetof() when available in C++11. Avoids Clang sanitizer complaining about old-style macros. (#94)

More typos in comments (#2738)

TabBar: fixed single-tab not shrinking their width down. ...

+ minor typo fixes (#2738)

Internals: Renaming window size calc functions.

TabBar: fixed ScrollToBar request creating bouncing loop when tab is larger than available space.

ColorPicker: Made rendering aware of global style alpha of the picker can be faded out. (#2711) ...

Note that some elements won't accurately fade down with the same intensity, and the color wheel when enabled will have small overlap glitches with (style.Alpha < 1.0).

Removing Funding file (unnecessary as we'll switch services)

Create FUNDING.yml

Explicit narrowing cast from size_t to UINT (#2726) ...

Clang: `non-constant-expression cannot be narrowed from type 'size_t' (aka 'unsigned long long') to 'UINT' (aka 'unsigned int') in initializer list [-Wc++11-narrowing]`

Backends: Vulkan: Added support for specifying multisample count. (#2705, #2706)

Backends: DX11: Fixed GSGetShader() call not passing an initialized instance count, would generally make the debug layer complain (Added in 1.72).

Version 1.73 WIP

Internal: Made ScrollToBringRectIntoView() handle recursing back to scroll parent window, so the function can be called elsewhere (instead of 1 deep recursion done in NavUpdateMoveResult().

Version 1.72b (patch for nav)

Nav: Made hovering non-MenuItem Selectable not re-assign the source item for keyboard navigation.

Scrolling, Nav: Fixed programmatic scroll leading to a slightly incorrect scroll offset when the window has decorations or a menu-bar (broken in 1.71). This was mostly noticeable when a keyboard/gamepad movement led to scrolling the view, or using e.g. SetScrollHereY() function. Fix/amend a0994d74.