Added ImGuiWindowFlags_ResizeFromAnySide flag and code to resize from any of the 4 corners (only 2 corners enabled). (#822)

Fixed a one frame glitch, when window claiming focus themselves on appear, the title bar wouldn't use the focused color on that frame.

Internals: Splitter Behavior doesn't show a border. (#319)

Style: Tweaked default WindowRounding value from 9 to 7 (#707)

Scrolling: SetScrollFromPosY() tweak to match change in a0d53fe with similar desirable jump/discontinuity at each limit to skip the (ItemSpacing>WindowPadding) difference (followup to 0e5b64e, #150)

Style, Scrolling: Fixed padding and scrolling asymetry where lower/right sides of a window wouldn't use WindowPadding properly + causing minor scrolling glitches.

Internals: Removed unnecessary duplicate scrolling code + added extra infos to Metrics window.

Settings: Internals: Renaming.

Settings: Internals: Simplifying code a bit. Creating Settings structure during first save. Windows where ImGuiWindowFlags_NoSavedSettings was late toggled will save settings correctly. (#1000)

Settings: Internals: Added FindSettingsHandler()

Settings: Internals: Exposed FindWindowSettings(). Simplified some code.

Settings: Internals: Renamed ImGuiSettingsWindow to ImGuiWindowSettings.

Build fix

Settings: Import old style .ini file

Settings: Make ImGuiWindow settings always first in the list.

Settings: Initializing ImGuiSettingsWindow so external users don't end up with uncleared data. Exposed MarkIniSettingsDirty() in imgui_internal.h

Settings: basic refactor so that additional data structures can be loaded/saved. Parser/saver is still the minimum viable poor-man parsing.

Settings: Internal renaming of structure and fields names.

Settings: Basic internal refactor to have functions for saving from/to memory (not exposed)

ImGuiTextBuffer: Renamed append() helper to appendf(), appendv() to appendfv(). Added reserve().

ImGuiStorage: Added BuildSortByKey() helper to rebuild storage from stratch.

Sisyphus says: tweaked comments about not using old-style OpenGL examples (#1459, #1394 etc.)

Menu bar: better software clipping to handle small windows, in particular child window don't have the minimum constraint added in e9a7e73 so we need to render clipped menus better.

Tweak expression to be less weird (how did that ever happen?)

Update imgui.cpp

Fixed unreferenced variable warnings.

Internals: Added SplitterBehavior(). (#319)

Begin: Fix border size latch when rounding uses Child or Popup value. (#707)

Exposed ImDrawCornerFlags, replaced occurences of ~0 with an explicit ImDrawCornerFlags_All. Inversed BotLeft (prev 1<<3, now 1<<2) and BotRight (prev 1<<2, now 1<<3).

Color picker: Tweak vertex shading code, since we aren't shading between PrimReserve and PrimVert the code can be expressed more naturally. (#346)