Demo: Tweaks.

Style: Removed ImGuiCol_ComboBg in favor of combo boxes using ImGuiCol_PopupBg for consistency. (#707)

Style Editor: Using local storage so Save/Revert button made some more sense without code passing its storage. Tweaked layout, added horizontal scroll bar, Fixed Save/Revert button to be always accessible. (fix #1211)

Style Editor: Sneakily adding a combo box to change colors (#707)

Style: Dark: Tweaks + setting BorderShadow correctly.

Internals: Window minor internal renaming + added WindowRounding latch.

Style: renamed style.ChildWindowRounding to style.ChildRounding, ImGuiStyleVar_ChildWindowRounding to ImGuiStyleVar_ChildRounding.

Merge pull request #1448 from codecat/minor-fixes ...

Examples: DirectX: fix wrong comment in dx implementation headers

Fix wrong comment in dx implementation headers

Style: ScaleAllSizes() helper rounds down every values so they are aligned on integers.

fix uninitialized atlas packing context

Columns: Added ImGuiColumnsFlags_GrowParentContentsSize to internal API to restore old content sizes behavior. (#1444, #125)

Internals: Updating condition/allow flags with a function.

Internals: Window: Store whether the windows has a close button (we need that info for window/tabs dropping preview calculation)

Internals: Added BringWindowToFront(), BringWindowToBack() helpers.

Windows with MenuBar have a larger minimum height to avoid artefacts (I fixed most of the vertical/horizontal artefacts, but the ones in rounded corners were too hard to fix).

Menu: Fixed minor rendering issues on the right size with rounded window when resizing a window small.

Scrollbar: Minor graphical fix for when scrollbar don't have enough visible space to display the full grab.

Minor comments, tweaks

Make it possible to use SetNextWindowPos() on a child window. Useful internally.

Made it guaranteed by API that after calling Begin() the last Item represent the title bar. (#823)

Scrollbar flicker fix for menus/popups (fixes 4d00dd8 and 2df8fa9). Hopefully right this time.

Columns: Clipping columns borders on Y axis on CPU because some GPU drivers appears to be unhappy with triangle spanning large regions (not sure why tbh). (#125) ...

Demo: Columns: Adding a billion of extra lines and using clipper.

Demo: Custom Rendering: Fixed clipping rectangle extruding out of parent window.

Fixed build (3e06450 not meant for master branch, but ok)

Internals: Added ArrowButton() helper.

Fixed scrollbar flickering on/off when uncollapsing a window (fixes 2df8fa9)

io.OptNoCursorBlink -> io.OptCursorBlink (#1427)

Added io.OptNoCursorBlink option to disable cursor blinking. (#1427). Renamed io.OSXBehaviors to io.OptMacOSXBehaviors. Should affect users as the compile-time default is usually enough. (#473, #650)

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