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

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)

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

+ shallow changelog tweaks

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

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

Internals: Removed RootWindowForTabbing, won't be needed. Nav: Not starting NavWindowingTarget when a modal is active (was not noticeable).

Drag and Drop: Calling BeginTooltip() between a BeginDragSource()/EndDragSource() or BeginDropTarget()/EndDropTarget() uses adjusted tooltip settings matching the one created when calling BeginDragSource() without the ImGuiDragDropFlags_SourceNoPreviewTooltip flag. (#143) + additional safety checks.

Internals: Moved selectable flags to avoid collision with public flags + rewrote some tests so we can consistently grep for (held && hovered)

Drag and Drop: Fixed ImGuiDragDropFlags_SourceNoDisableHover to affect hovering state prior to calling IsItemHovered() + fixed description. (#143)

Fix missing ImmReleaseContext in default Win32 IME handler (#1932)

Generalized d11d211e so regular popups (without the AlwaysAutoResize flag) also have a smaller minimum size, but reduced it to an arbitrary 4.0f instead of 1.0f to ease debugging of faulty situations. (#1909)

Merge branch 'master' into viewport ...

# Conflicts:
#	imgui.cpp

Drag and Drop: Fixed an incorrect assert when dropping a source that is submitted after the target (bug introduced with 1.62 changes related to the addition of IsItemDeactivated()). (#1875, #143)

Allow popup from ignoring the style.WindowMinSize values so short menus are not padded. (#1909) Wider generalization of b166037.