Merge branch 'master' into docking

# Conflicts:
#	imgui.cpp

docs/CHANGELOG.txt

@@ -41,6 +41,14 @@ HOW TO UPDATE?
 
 Breaking changes:
 
+- ColorEdit, ColorPicker: redesigned how alpha is displayed in the preview square. (#8335, #1578, #346)
+   - Removed ImGuiColorEditFlags_AlphaPreview (made value 0): it is now the default behavior.
+   - Prior to 1.91.8: alpha was made opaque in the preview by default _unless_ using ImGuiColorEditFlags_AlphaPreview.
+   - We now display the preview as transparent by default. You can use ImGuiColorEditFlags_AlphaOpaque to use old behavior.
+   - The new flags may be combined better and allow finer controls:
+     - ImGuiColorEditFlags_AlphaOpaque: disable alpha in the preview, but alpha value still editable.
+     - ImGuiColorEditFlags_AlphaNoBg: disable rendering a checkerboard background behind transparent color.
+     - ImGuiColorEditFlags_AlphaPreviewHalf: display half opaque / half transparent preview.
 - Backends: SDLGPU3: Renamed ImGui_ImplSDLGPU3_InitInfo::GpuDevice to Device
   for consistency. (#8163, #7998, #7988)
 
@@ -51,9 +59,20 @@ Other changes:
   snapped to pixels. Effectively it would only be noticeable when hinting
   is disabled with ImGuiFreeTypeBuilderFlags_NoHinting, as hinting itself
   snaps glyph advances.
+- Inputs: added IsMouseReleasedWithDelay() helper. (#8337, #8320)
+  Use if you absolutely need to distinguish single-click from double-clicks
+  by introducing a delay. This is a very rarely used UI idiom, but some apps
+  use this: e.g. MS Explorer single-click on an icon triggers a rename.
+  Generally use with 'delay >= io.MouseDoubleClickTime' + combine with a
+  'io.MouseClickedLastCount == 1' check.
 - Windows: legacy SetWindowFontScale() is properly inherited by nested child
   windows. Note that an upcoming major release should make this obsolete,
   but in the meanwhile it works better now. (#2701, #8138, #1018)
+- ColorEdit, ColorPicker: Fixed alpha preview broken in 1.91.7. (#8336, #8241). [@PathogenDavid]
+- Tabs, Style: reworked selected overline rendering to better accommodate
+  for rounded tabs. Reduced default thickness (style.TabBarOverlineSize),
+  increased default rounding (style.TabRounding). (#8334) [@Kian738, @ocornut]
+  styles as the current look is not right (but ImGuiCol_TabSelectedOverline stays the same).
 - Examples: DirectX12: Reduced number of frame in flight from 3 to 2 in
   provided example, to reduce latency.
 - Backends+Examples: Vulkan: better handle VK_SUBOPTIMAL_KHR being returned by