Split ImGuiItemFlags_LiveEdit into ImGuiItemFlags_LiveEditText, ImGuiItemFlags_LiveEditScalar. Added Demo contents. (#9476, #701)

cc #3936, #3946, #5904, #6284, #8149, #8065, #8665, #9117, #9299, #700, #1351, #1875, #2060, #2215, #2380, #2550, #3083, #3338, #3556, #4373, #4714, #4885, #5184,#5777, #6707, #6766, #8004, #8303, #8915, #9308

imgui.cpp

@@ -6358,6 +6358,7 @@ bool ImGui::IsItemDeactivated()
     return g.DeactivatedItemData.ID == g.LastItemData.ID && g.LastItemData.ID != 0 && g.DeactivatedItemData.ElapseFrame >= g.FrameCount;
 }
 
+// Since 1.92.9: consider using NoLiveEdit flags if all you need to that values are not written bo backing variable while typing.
 bool ImGui::IsItemDeactivatedAfterEdit()
 {
     ImGuiContext& g = *GImGui;