ref #39 : by default, hide the keyboard navigation highlight

It does not render properly so better make it invisible

Author: ggerganov

src/imtui-impl-text.cpp

@@ -282,6 +282,7 @@ bool ImTui_ImplText_Init() {
     ImGui::GetStyle().Colors[ImGuiCol_TitleBg]          = ImVec4(0.35, 0.35, 0.35, 1.0f);
     ImGui::GetStyle().Colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.15, 0.15, 0.15, 1.0f);
     ImGui::GetStyle().Colors[ImGuiCol_TextSelectedBg]   = ImVec4(0.75, 0.75, 0.75, 0.5f);
+    ImGui::GetStyle().Colors[ImGuiCol_NavHighlight]     = ImVec4(0.00, 0.00, 0.00, 0.0f);
 
     ImFontConfig fontConfig;
     fontConfig.GlyphMinAdvanceX = 1.0f;