+ #6983

Backends: OpenGL3: minor update of generated loader to match latest downloaded glcorearb.h/khrplatform.h files.

Backends: Win32: Removed silent return when calling ImGui_ImplWin32_WndProcHandler() with no active context! (#6275)

Better standardized similar checks in other backends.

Windows, Internal: added experimental SkipRefresh mode. (#3515, #4763, #7556, #5116 , #4076, #2749, #2268)

currently: ImGui::SetNextWindowRefreshPolicy(ImGuiWindowRefreshFlags_TryToAvoidRefresh);
- This is NOT meant to replace frame-wide/app-wide idle mode.
- This is another tool: the idea that a given window could avoid refresh and reuse last frame contents.
- I think it needs to be backed by a careful and smart design overall (refresh policy, load balancing, making it easy and obvious to user).
- It's not there yet, this is currently a toy for experimenting.
My other issues with this:
- It appears to be very simple, but skipping most of Begin() logic will inevitably lead to tricky/confusing bugs. Let's see how it goes.
- I don't like very much that this opens a door to varying inconsistencies
- I don't like very much that it can lead us to situation where the lazy refresh gets disabled in bulk due to some reason (e.g. resizing a dock space) and we get sucked in the temptation to update for idle rather than update for dynamism.

Windows: Changed default ClipRect to extend to windows' left and right borders. (#3312, #7540, #3756, #6170, #6365)

InnerClipRect use ImFloor() matching docking branch (fix c4186853 for #6861, #2884, followed by rename 94da5842)

Since negative windows can never be visibile in master it didn't show as a difference.

No functional changes.

Tables: Angled headers: added TableAngledHeadersTextAlign, ImGuiStyleVar_TableAngledHeadersTextAlign. (#6917)

Table: Angled Headers: internal refactor to facilitate changing angled header bg and text colors per column. (#6917)

Fixed static analyzer warning "Pointer to local array 'overlay_buf' is stored outside the scope". Technically not used outside that scope, but best to play nice.

ImGuiIO: moved IMGUI_DISABLE_OBSOLETE_KEYIO block lower in the structure so other fields layout are not affected by it (#7534)

This is essentially a misleading grace feature allowing a build mistake to be made, as we technically are more flexible now. BUT if we reintroduce a need we may more harshly move it to the top of the structure to detect issues.

ImDrawList: moved cold fields lower in the structure so hot fields are closer to each others + better packed ImGuiNavItemData

Backends: Vulkan: Added convenience support for Volk via IMGUI_IMPL_VULKAN_USE_VOLK define. (#6582, #4854)

Windows: Fixed subsequent Begin() append calls from setting last item information for title-bar. (#7506, #823)

Amend 06760505, 27fd1b91

TreeNode: fixed layout so that TreeNode("") or TreeNode("##HiddenLabel") may properly be used with SameLine(0,0). (#7505, #282)

Also adjust some of the interact_bb padding, arbitrary interact padding not meaningful as empty label is likely to be followed by extra item. User likely to use ImGuiTreeNodeFlags_SpanAvailWidth.

Drag and Drop: assert when nesting  BeginDragDropSource() and BeginDragDropTarget() (#7504) + update Gallery links

Fonts: Fixed font ascent and descent calculation when a font hits exact integer values. (#7399, #7404)

Backends: SDL3: Re-enable calling SDL_StartTextInput()/SDL_StopTextInput(). (#7452, #6306, #6071, #1953)

Amend: a7703fe6

Extracted part of NewFrame() into SetupDrawListSharedData() for documentation purpose. (#7495, #6406)

Also changed g.Font->ContainerAtlas->Flags to g.IO.Fonts->Flags

Silent zealous/stupid warning introduced by Clang 16 (shipping with VS2022) with -Weverything. Pointers are now illegal!

Drags, Sliders, Inputs: Reactivated decimal point replacement for SliderScalar and DragScalar. (#7389, #6719, #2278)

Amend/fix 4a242644