Allow dragging all number input fields left and right with middle mouse click to increase or decrease their values faster

[greeenlaser]

https://github.com/Lost-Empire-Entertainment/Elypso-engine/blob/eb1a2983bfb929d7c3e3c42f3d10178de443615a/Engine/src/engine/graphics/gui/gui_inspector.cpp#L105

[jonesy-b-dev]

This can be achieved using the ImGui::DragFloat() function example:

               // Label             v*        speed  min      max
ImGui::DragFloat("Near Clip plane", nearClip, 0.01f, 0.0001f, 1000000000);