Default item width for AlwaysAutoResize windows expressed as a factor of font height

imgui.cpp

@@ -3452,7 +3452,7 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
         if (window->Size.x > 0.0f && !(flags & ImGuiWindowFlags_Tooltip) && !(flags & ImGuiWindowFlags_AlwaysAutoResize))
             window->ItemWidthDefault = (float)(int)(window->Size.x * 0.65f);
         else
-            window->ItemWidthDefault = 200.0f;
+            window->ItemWidthDefault = (float)(int)(g.FontSize * 16.0f);
 
         // Prepare for focus requests
         window->FocusIdxAllRequestCurrent = (window->FocusIdxAllRequestNext == IM_INT_MAX || window->FocusIdxAllCounter == -1) ? IM_INT_MAX : (window->FocusIdxAllRequestNext + (window->FocusIdxAllCounter+1)) % (window->FocusIdxAllCounter+1);