Version number 1.47

TODO items. Moved ImDrawList::Clear* methods suggesting they aren't for end-user.

Minor rebranding "ImGui" -> "dear imgui" (#21)

imconfig.h tweak, not advertising IMGUI_INCLUDE_IMGUI_USER_INL anymore.

Initial creation of a ImGuiWindowFlags_NoBringToFrontOnFocus window push it at the front of global window list

Exported high-level versions of PushClipRect / PopClipRect to imgui_internal.h (#448)

BeginPopupContextItem: fixed comment (#439)

Added BeginPopupContextItem() comment (#439)

BeginPopupContextWindow() and BeginPopupContextVoid() reopen window on subsequent click (#439)

Fix for popups being incorrectly positioned if their contents are larger than display and WindowPadding < DisplaySafeAreaPadding

ImDrawList: Fixed bug with PopClipRect() sometimes altering TextureId + fixed merging of draw calls with same TextureId

TreeNode(): Fixed horizontal spacing for layout to match Bullet() (followup to #414, #282)

Bullet(), BulletText(): vertical and horizontal alignment fixes (namely for widget sized line height). (followup to #414, #282)

TreeNode() fixed alignment of collapse arrow to it matches bullet (broken in 4006fb7)

Added ProgressBar() (#333)

Added GetColorU32 helpers (previously internal and misplaced as window->Color())

Ensure that individual widgets are pixel aligned when using non pixel snapped font rendering.

MenuBar clipping rectangle fix for bordered mode

Various adjustment for border to be inside instead of outside the window size

Fixed SizeContents and auto-fit size not being rounded to integer, which affects border rendering when using non-default font

InputText: update mouse drag on mouse move only & key input reposition selection bounds (better fix for #429)

InputText: when keys are being input while mouse is dragging, disable mouse drag until button release (#429)

Metrics: computing drawcmd bounding box handle case where buffer has been de-indexed.

Minor tidying up of now redundant code

Renamed Color() helpers to ValueColor() - dangerously named, rarely used and probably to be made obsolete.

Added SetItemAllowOverlap() exposed in imgui_internal.h only

Commenting asserts

TreeNode/CollapsingHeader: some minor cleanup of that horrible function.

TreeNode/CollapsingHeader: some minor cleanup of that horrible function.

Comments & spacing