Docs: Funding link, Tweaks, Gallery links.

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: ['https://github.com/ocornut/imgui/wiki/Sponsors']

imgui_widgets.cpp

@@ -7841,6 +7841,7 @@ bool ImGui::TabItemLabelAndCloseButton(ImDrawList* draw_list, const ImRect& bb,
         text_pixel_clip_bb.Max.x -= close_button_sz;
     }
 
+    // FIXME: if FramePadding is noticeably large, ellipsis_max_x will be wrong here (e.g. #3497), maybe for consistency that parameter of RenderTextEllipsis() shouldn't exist..
     float ellipsis_max_x = close_button_visible ? text_pixel_clip_bb.Max.x : bb.Max.x - 1.0f;
     RenderTextEllipsis(draw_list, text_ellipsis_clip_bb.Min, text_ellipsis_clip_bb.Max, text_pixel_clip_bb.Max.x, ellipsis_max_x, label, NULL, &label_size);