Added IsMousePosValid() helper.

ImFontConfig: Added RasterizerMultiply option to alter the brightness of individual fonts at rasterization time, which may help increasing readability for some. Added RasterizerFlags for custom rasterizer flags (aka imgui_freetype)

ImFontConfig: Comments, const.

Fixed compilation with IMGUI_DISABLE_OBSOLETE_FUNCTIONS defined

IO: io.MousePos needs to be set to ImVec2(-FLT_MAX,-FLT_MAX) when mouse is unavailable/missing. Previously ImVec2(-1,-1) was enough but we'll now accept negative mouse coordinates.

Marked all fmt + va_list functions with format attribute so GCC/Clang can warn about them. Not ignoring -Wsuggest-attribute=format anymore for GCC/Clang.

Version 1.52 WIP

Version 1.51

Demo: Displaying version number in test window.

Style: Tweaked default border (undo half-way from original c1e1e01) (#707)

Minor miscellaneous merges from Navigation branch to reduce divergence a little bit

Renamed IsItemHoveredRect() to IsItemRectHovered(). Renamed IsMouseHoveringWindow() to IsWindowRectHovered() - follow up to previous commit 6be7d49 merged from Nav.

Style: Added obsolete redirects for ImGuiCol_Columns*** fields. (ref 648f75b)

Merge part of 88c1966 from Nav branch. Renamed IsMouseHoveringAnyWindow() -> IsAnyWindowHovered(), IsMouseHoveringWindow() -> IsWindowHoveredRect() for consistency. Kept inline rediection function.

(internals) Renamed FocusedWindow to NavWindow to match terminology of navigation branch

Merge 20a0fde Tidying up default clipboard handler for non Windows-OS (from Nav branch)

Merge 2545d75 from Nav - Tidying up, removed two unnecessary window flags from being exposed in imgui.h

Minor miscellaneous merges from Navigation branch to reduce divergence a little bit

ImRect::Clip() -> ClipWith() to clarify meaning, going to undo the change in Nav branch.

Fixed an assert when calling CloseCurrentPopup() twice in a row.

Removed tabs that slipped through the cracks

ImDrawList: Added GetClipRectMin(), GetClipRectMax() helpers. Comments.

Columns: Caching columns clipping rectangles (#125)

Columns: Moved PushColumnClipRect() to imgui_internal.h

Columns: Fix for explicit content width and scrollbar. (#519, #125)

Merge branch 'ggtucker-master'

Columns: Columns set resize based on the presence of vertical scrollbar. Not 100% sure about that but it looks like we've fixed enough bugs that this may not cause troubles anymore. (#125, #913, #893, #1138)

Demo: Columns: Added Horizontal Scrolling demo. Tweaked another Columns demo. (#519, #125, #913)

Columns: Fixed another form of shearing made visible by the PreserveWidth option. The code was initially added in c46d563 to fix because we've fixed in e42aaed. (#913, #125)

Columns: A set of column (and most importantly the right-most column) do not register its content to the parent, not affecting the window contents size. (#519, #125, #913)