ImGui_GM v1.0.12

hewwo, v1.0.12 of imgui adds wrappers for setting/retrieving a few ImGuiIO variables, along with a change to how imgui_gm retrieves input

Added:

• ImGui.WantKeyboardCapture([val])
• ImGui.WantMouseCapture([val])
• ImGui.WantMouseCaptureUnlessPopupClose([val])
• ImGui.WantTextInput([val])
  • These wrappers allow you to retrieve the given variable if no argument is provided, and set the variable if a boolean is provided

Changes:

• ImGui_GM will now check io.WantTextInput before reading keyboard_string, additionally it will no longer overwrite and clear keyboard_string each frame. Instead, the previous string is stored as ImGui retrieves input from the user and restored when input is deselected/confirmed