switched to imgui docked, docks, but no viewport, to fix

.gitmodules

@@ -1,3 +1,4 @@
 [submodule "src/imgui"]
 	path = src/imgui
 	url = https://github.com/ocornut/imgui.git
+  branch = docking

src/Engine/engine/engine.h

@@ -1068,6 +1068,9 @@ void Engine::initImgui() {
 
   ImGui_ImplVulkan_Init(&initInfo);
 
+  // Config ImGui
+  ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_DockingEnable;
+
   _mainDeletionQueue.pushFunction([this, imguiPool]() {
     ImGui_ImplVulkan_Shutdown();
     vkDestroyDescriptorPool(
@@ -1132,10 +1135,16 @@ void Engine::buildImgui() {
   ImGui_ImplVulkan_NewFrame();
   ImGui_ImplGlfw_NewFrame();
   ImGui::NewFrame();
+  // Docking
+  ImGui::DockSpaceOverViewport();
 
   // Main ImGui things
   ImGui::ShowDemoWindow();
 
+  //if(ImGui::Begin("Viewport")) {
+
+  //}
+
   if(ImGui::Begin("Background Shader control")) {
     ComputeEffect& selected = backgroundEffects[currentBackgroundEffect];
 
@@ -1151,7 +1160,6 @@ void Engine::buildImgui() {
       backgroundEffects.size() - 1
     );
 
-
     ImGui::InputFloat4(
       "data1",
       (float*)& selected.data.data1
@@ -1169,6 +1177,7 @@ void Engine::buildImgui() {
 			(float*)& selected.data.data4
 		);
   }
+
 	ImGui::End();
 
   // Finish everything

src/imgui

@@ -1 +1 @@
-Subproject commit 5220a3f48d39c000da8b46fb0fccf3dd62695c51
+Subproject commit b48d1afbe8ee8b238e2961dc363a949dd7304e23