Merge branch 'master' of https://github.com/ocornut/imgui

Version 1.73

Update README.md

Documentation: Various tweaks and improvements to the README page. [@ker0chan]

CollapsingHeader: Added support for ImGuiTreeNodeFlags_Bullet and ImGuiTreeNodeFlags_Leaf on framed nodes. (#2159, #2160) ...

The Bullet and Leaf ImGuiTreeNodeFlags are now taken into account for Framed/CollapsingHeader tree nodes as well. TreeNodeEx() can be used to specify these flags. A choice was made to left-adjust the Framed text when no Bullet/Arrow is rendered, since this was deemed to look better in the Framed context (especially when considering that CollapsingHeader is drawn using NoTreePushOnOpen, so child/sibling Text items etc will often be non-indented).

Demo tweaks. Comments. Compacting the rarely used AutoFitXXX fields in ImGuiWindowTempData.

Internal: Tree: tweaks (initially tried to implement auto-scrolling, stashed)

Backends: OpenGL3: Attempt to automatically detect default GL loader by using __has_include. Followup to 44cd8e3 (#2798)

ImVector: added find, find_erase, find_erase_unsorted helpers.

Selectable: Added ImGuiSelectableFlags_AllowItemOverlap flag in public api (was previously internal only).

Readme, Wiki: Image loading examples.

Fixed mouse event forwarding in macos example (#2710, #1961)

ColorPicker / ColorEdit: restore Hue when zeroing Saturation. (#2722, #2770) - changelog, fixed uninitialized variables, tweaks, renaming.

TreeNode: Added ImGuiTreeNodeFlags_SpanAvailWidth and ImGuiTreeNodeFlags_SpanFullWidth flags (#2451, #2438, #1897) ...

Added demo bits.

ImDrawListSplitter: fixed an issue merging channels if the last submitted draw command used a different texture. (#2506)

Style: Allow style.WindowMenuButtonPosition to be set to ImGuiDir_None to hide the collapse button. (#2634, #2639) ...

+ Fix #2775

Merge branch 'features/ellipsis_rendering' ...

# Conflicts:
#	imgui.cpp

Internal: Offset STB_TEXTURE_K_ defines to remove that change from #2541 + sponsors update.

Font: Narrow ellipsis: various minor stylistic tweaks (#2775)

Columns: Separator: Fixed a bug where non-visible separators within columns would alter the next row position differently than visible ones. ...

Fixed rounding issues also leading to change of ScrollMax depending on visible items (in particular negative coordinate would be rounded differently)

Nav, Scrolling: Added support for Home/End key. (#787)

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.

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.

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)

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.