ColorButton: Undo ce203f9

ColorEdit4: Fix not forwarding ImGuiColorEditFlags_AlphaBar flag to ColorPicker4 (#346)

ColorButton: ImGuiColorEditFlags_HalfAlphaPreview flag to render both opaque and alpha-with-checkerboard versions of the peak preview (#346)

RenderColorRectWithAlphaCheckerboard() in one layer to shunt out anti-alasing artefacts when rounded. Added ImLerp(int,int,float). (#346)

ColorEdit, ColorPicker: Fixed broken build due to commiting an undesirable change in 78a8f79 (#346)

ColorButton, ColorPicker: painfully made RenderColorRectWithAlphaCheckerboard more friendly to using Rounding and Border in style, still not perfect :( (#346) + comments

ColorEdit, ColorPicker: added ImGuiColorEditFlags_NoAlphaPreview flag (#346). Reorder flags again.

ColorButton: Push a text baseline offset if higher than g.FontSize. (#346)

ColorEdit, ColorPicker, ColorButton: Display grid under transparent colors (WIP) (#346)

GetColorU32(ImGuiCol): avoid using GImGui twice since some implementation make it a TLS-ish variable with non-trivial accessors.

Added GetColorU32(u32) variant that does the style alpha multiply without a floating point round trip. Not 100% sure about that before the signature may seem ambiguous? But also make using imgui+drawlist more consistent in end-user extensions.

ColorEdit, ColorPicker: Context / options menu allows to toggle between u8 and float display. Using short words to avoid localization. (#346)

ColorPicker: Handle out of 0..1 range colors when displaying the cross hair. (#346)

ColorEdit: Added ImGuiColorEditFlags_Float flag to display and edit drag values in 0.0..1.0 range instead of 0..255. (#346)

ColorPicker,ColorButton: Honor Border/Shadow style settings (#346)

ColorPicker: Added ImGuiColorEditFlags_AlphaBar option (#346)

ColorPicker: Honor ImGuiColorEditFlags_NoColorSquare flag + comments (#346)

ColorPicker: new prototype for ColorButton() .Added _NoTooltip, _NoLabel flags. Changing _Alpha flag to _NoAlpha makes so much much sense and allow to revert default parameters to zero. ColorEdit4/Picker4 don't attempt to read/write fourth component, making ColorEdit3/Picker3 shorter/faster. Tooltip and Picker called from ColorEdit can have a title. Picker shows colored square. Moved ColorTooltip() to imgui_internal.h (#346)

ColorPicker: Renamed _NoSliders to _NoInputs (#346)

ColorPicker: Longer white line for hue/alpha selection, scale down according to ItemInnerSpacing. (#346)

ColorPicker: Removed extraneous ImGui:: prefixes + minor comments (#346)

ColorPicker: Don't use Alpha setting when enabling all 3 sliders (#346)

Better, unified color tooltip (#346)

Merge branch 'master' into 2016-02-colorpicker

Tooltip: SetTooltip() is expanded immediately into a window, honoring current font / styling setting. Add internal mechanism to override tooltips (not exposed in BeginTooltip yet because bools are evil) (#862)

Internals: Move GetVisibleRect() a few functions above so it gets to hang out with its peers.

Internals: renaming IndexWithinParent to OrderWithinParent

Removed IsPosHoveringAnyWindow() which was severaly broken and misleading (most people want to use io.WantCaptureMouse). Added dummy function with assert for now. (#1237)

Merge branch 'master' into 2016-02-colorpicker

Comments about GlyphExtraSpacing (#1192)