Viewport: when moving window we use the moving window viewport unless drag and dropping. This is to fix e.g. IsItemHovered() + Tooltip pattern that may be active while moving a window. (#1542)

Viewport: Revert part of 7abf72e, the viewport ownership stealing is problematic. (#1542). Will rework in the context of docking. (+1 squashed commits) ...

+ Fixed unused prototype warning (left-over from a merge)

Merge branch 'master' into viewport ...

# Conflicts:
#	examples/imgui_impl_dx10.cpp
#	examples/imgui_impl_dx11.cpp
#	imgui_demo.cpp

Demo: Fixed spacing from b629f90 change.

Examples: Tweaked the main.cpp example structure for all examples. (There are a few hidden agendas here: 1) I would like to avoid encouraging people from using the implicit "Debug" window, and promote using Begin/End. In spite of my best attempt, there are a few feature of the upcoming docking system that cannot work 100% properly for the implicit Debug window, so future proof let's not put that feature in the spotlight too much for new users. 2) Moved dumb hardcoded positions into a single spot that can be replaced with a viewport relative position and not affect other demo windows. 3) Calling ShowDemoWindow before anything else, also for the benefit of a specific docking demo which will have an ordering constraint which is not really problematic in a real app but shouldn't be put forward in the demo.

Examples: DX10, DX11: Fixed unreleased resources in Init and Shutdown functions. (#1944)

Demo: Spacing.

Merge branch 'master' into viewport ...

# Conflicts:
#	imgui.cpp
#	imgui_demo.cpp
#	imgui_internal.h

Demo: Re-ordered example app code to match their menu order and forward declaration order + added header to delimitate them.

Viewport: Fixed CTRL+TAB windowing list displaying too many dimming layers (fix dd61c48 for viewport branch)

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

Merge branch 'master' into viewport ...

# Conflicts:
#	examples/imgui_impl_opengl3.cpp
#	imgui.cpp
#	imgui.h
#	imgui_draw.cpp
#	imgui_internal.h

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

Examples: include for intptr_t on tdm-gcc + mingw32 (#1936) + mouse buttons comments

IsItemHovered(): Added ImGuiHoveredFlags_AllowWhenDisabled flag to query hovered status on disabled items. (#1940, #211) ...

+ shallow changelog tweaks

Examples: OpenGL3: Added shaders more versions of GLSL + made the example app default to GL 3.0 + GLSL 130 (instead of GL 3.2 + GLSL 150) unless on Mac. (#1938, #1900, #1513, #1466, etc.)

Fixed missing value in GetStyleColorName(). (#1939) broken with c7016c2

OpenGL3: Added error output when shaders fail to compile / link. (#1938)

Internals: Extracted StartMouseMovingWindow so we can add code to turn an arbitrary widget into a window mover (will be useful to make the Collapse button a window mover past a mouse drag threshold) + added a couple of _None flags.

Internals: Fixed CalcSizeContents() returning negative value on first run (inconsequential afaik, but fixing for sanity)

Internals: Fixed CalcSizeContents() returning negative value on first run (inconsequential afaik, but fixing for sanity)

Viewport: Made it possible for the moving window to detach and recreate its own Viewport (used by Docking)

Internals: HoveredWindowUnderMovingWindow special handling for drag and drop of window without altering the _NoInputs window flag, which worked but messed up the IsWindowHovered() user-facing flags.

Viewport: Reapply/recover ownership of viewport which is convenient for docking but also can recover from faulty .ini files. (#1542)

Internals: Misc/shallow merge from Docking branch.

Internals: Misc/shallow merge from Docking branch.

Internals: Move IMGUI_CDECL declaration to imgui_internal.h so everyone can profit.

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

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

Merge branch 'master' into viewport ...

# Conflicts:
#	imgui.cpp