Internals: Tidying up, moving helpers to imgui_internal.h (in prevision of 1.64 refactor)

ImFontAtlas Comments (#2042) + added ImGuiFontAtlas_None for consistency.

ImDrawList: Large text passed to AddText() are being scanned for their end in order to avoid pre-reserving too many vertices.

ImDrawList: Fixed clipping of leading lines above the clipping rectangle from counting in the worst case vertices reservation. (fix code added in #200!)

Internals: Extracted RenderMouseCursor() out of EndFrame(). Moved to imgui_draw.cpp along with RenderArrowPointingAt(). Comments. (#2013)

Internals: Changed signature of ShadeVerts functions to remove pointers. (#1286, #1700, #1986)

ImFontAtlas::AddFontDefault: Made it possible to override glyph ranges. (#1965)

Internals: Drag and Drop: default drop preview use a narrower clipping rectangle (no effect here, but other branches uses a narrow clipping rectangle that was too small so this is a fix for it) + Comments

Added asserts to catch illegal modifications of the font atlas between NewFrame() and EndFrame()/Render(). (#1958)

Fix warning when IMGUI_DEFINE_MATH_OPERATORS is already defined by build system. (#1950)

Comments, exposed a few things in imgui_internal.h for consistency, added ImQsort wrapper.

Revert part of c7016c2 incorrectly renaming ImGuiCol_NavWindowingHighlight to ImGuiCol_NavWindowListHighlight, that was wholly unnecessary (and not documented!). (also invalidate #1939)

Nav: Added a CTRL+TAB window list and changed the highlight system accordingly. (#787)

Internals: Removed unused ShadeVertsLinearAlphaGradientForLeftToRightText code.

Fixed a include build issue for Cygwin in non-POSIX (Win32) mode. (#1917, #1319, #276)

Tweaked software mouse cursor offset to match the offset of the corresponding Windows 10 cursors. (followup to #1914)

Fixed software Hand cursor from not actually working. Fixed demo from crashing. Fixed typo and extraneous trailing space. Added Changelogs. (#1913, #1914)

add hand cursor support (+11 squashed commit)

Version 1.63 WIP

Demo: Fixed incorrect response to Begin() returning false in overlay demo (which cannot happen since we don't have a title bar, but that doesn't make it a good behaving demo!).

Version 1.62

ImFontConfig: Added GlyphMinAdvanceX/GlyphMaxAdvanceX settings useful to make a font appears monospaced, particularly useful for icon fonts. (#1869)

Added GetGlyphRangesChineseSimplifiedCommon() helper that returns a list of ~2500 most common Simplified Chinese characters. Renamed GetGlyphRangesChinese() to GetGlyphRangesChineseFull() to distinguish other variants and discourage using the full set. (#1859) ...

Changed the accumulative encoding to remove the implicit +1 which only saved a little space and made things more confusing.

Fixed GCC pre-8 build. (#1822) + added bonus the non-ASCII character pasted from GCC breaks my SourceTree/Git combo

Disabled GCC 8.1.0 warnings -Wclass-memaccess (#1822)

Remove trailing white spaces.

Version 1.62 WIP

Version 1.61 + todo additions

Added ImAtof, ImCeil, ImFloorStd to IMGUI_DISABLE_MATH_FUNCTIONS for consistency. Configuration comments.

Added IMGUI_DISABLE_MATH_FUNCTIONS in imconfig.h to make it slightly easier to redefine wrappers to std maths functions such as fabsf(), fmodf(), etc. Comments.