Small pre-release QOL fixes

[Web-eWorks]

Yet another "microfixes" PR in a long tradition of the same, it does what it says on the tin. Going to leave this open for a little bit to collate small QOL fixes I find.

• Default to the user's environment language code when no config file exists. Fixes Use system language by default #3723.
• Fix lua error when changing ship type. Fixes Buying or switching ships crashes the game #5322.
• Fix asserts / issues with ui.isAnyWindowHovered / ui.tabBarFont.
• Fix segfault when accessing invalid renderer ptr. Fixes Segfault on master #5328. Fixes Orbit View display errors #5329. Probably fixes Atlas view empty sometimes #5330.

[impaktor]

QOL = "Quantity of Lines"?

[Web-eWorks]

Quality of Life actually, if you want Quantity of Lines then you'll have to wait until the next ImGui upgrade PR... 😄

[Gliese852]

Still getting
contrib/imgui/imgui.cpp:6635: bool ImGui::IsWindowHovered(ImGuiHoveredFlags): Assertion '(flags & ImGuiHoveredFlags_AllowWhenOverlapped) == 0' failed. when I launch the game, and
contrib/imgui/imgui.cpp:7075: void ImGui::PopID(): Assertion window->IDStack.Size > 1' failed` when I click the 'personal information' button
EDIT: oh, in fact, I wanted to write this in #5327, but it would probably be even more appropriate to add a fix for this here

[Web-eWorks]

Still getting contrib/imgui/imgui.cpp:6635: bool ImGui::IsWindowHovered(ImGuiHoveredFlags): Assertion '(flags & ImGuiHoveredFlags_AllowWhenOverlapped) == 0' failed. when I launch the game, and contrib/imgui/imgui.cpp:7075: void ImGui::PopID(): Assertion window->IDStack.Size > 1' failed` when I click the 'personal information' button EDIT: oh, in fact, I wanted to write this in #5327, but it would probably be even more appropriate to add a fix for this here

Thanks! I wasn't sure if you were wanting to fix that in your branch or not, but I can fix that here pretty quickly.