Renamed stb_truetype.h to imstb_truetype.h, stb_textedit.h to imstb_textedit.h, and stb_rect_pack.h to imstb_rectpack.h. (#1718, #2036)
If you were conveniently using the imgui copy of those STB headers in your project, you will have to update your include paths.
The reason for this change is to avoid conflicts for projects that may also be importing their own copy of the STB libraries. Note that imgui's copy of stb_textedit.h is modified.

Refactor: Tweaked and improved the sectioning to facilitate grepping/moving around and applied to all files. (#2036)

Refactor: Moved one indentation level in the bulk of the ShowMetricsWindow() function. Should appear as a small diff if whitespaces changes are ignored. (#2036)

Refactor: moved low-layout helpers to imgui_widgets.cpp (Spacing, Dummy, NewLine, Separator, etc.) (#2036)

Nav: Removed the [Beta] tag from various descriptions of the gamepad/keyboard navigation system. Although it is not perfect and will keep being improved, it is fairly functional and used by many. (#787)

Renamed io.OptCursorBlink/io.ConfigCursorBlink to io.ConfigInputTextCursorBlink. (#1427) + changed ImGuiIO layout.

Minor mostly inconsequential merges from Viewport + LoadIniSettingsFromMemory() entirely skip lines starting with ';'

`gladLoadGL` returns 0 on fail, not the other way around.

Internals: Exposed SliderBehaviorT, DragBehaviorT, RoundScalarWithFormatT, SliderCalcRatioFromValueT. (#2036)
Renamed RoundScalarWithFormat -> RoundScalarWithFormatT.
Renamed SliderBehaviorCalcRatioFromValue -> SliderCalcRatioFromValueT

Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section. DONE! (part 9) (#2036, #787)

Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section. (part 8) (#2036, #787)

Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section. (part 7) (#2036, #787)

Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section (moved NavUpdate which would not diff properly unless empty lines were removed, hence the previous patch). (part 5) (#2036, #787)

Refactor: Internals: Removing new lines from NavUpdate solely because I couldn't find another way to get a neat diff/patch when moving it. (part 4) (#2036, #787)

Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section (extracted some code out of NavUpdate()). (part 3) (#2036, #787)

Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section. (part 2) (#2036, #787)

Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section. (part 1) (#2036, #787)