Added dedicated server support

[tdeslandes]

This commit adds the ability to connect the NetImgui server to an Unreal dedicated server

[jonpas]

Would appreciate this over at https://github.com/IDI-Systems/UnrealImGui. This project doesn't seem to be active so we forked it and are accepting contributions.

[sammyfreg]

I created a pull request in the IDI-Systems fork (net_imgui branch) with this change. The branch was also made up to date with master and I updated the NetImgui Library to latest 1.9 version.

[urosidoki]

Hi.

I tried the changes to make it work with a dedicated server but we had no success.
I have seen you still rely on Slate to be running for it, but it seems that Slate is not running in dedicated Server, right?

Am I doing something wrong?

Cheers,

[tdeslandes]

This is the whole point of this PR, the dedicated server doesn't package with Slate so the font and texture are created manually instead of using Slate's.

[urosidoki]

Yeah, but the since the Tick of the FImGuiModuleManager is attached to the Slate, we are not ticking the module manager, right?