Backends: GLFW: fix ImGui_ImplGlfw_TranslateUntranslatedKey() for grave accents. (#456, #2625) + fix preceeding commit.

Amend 100ede57 + amend b17b2fb
diff --git a/backends/imgui_impl_glfw.cpp b/backends/imgui_impl_glfw.cpp
index 17c210a..b5b1183 100644
--- a/backends/imgui_impl_glfw.cpp
+++ b/backends/imgui_impl_glfw.cpp
@@ -286,7 +286,7 @@
     const char* key_name = glfwGetKeyName(key, scancode);
     if (key_name && key_name[0] != 0 && key_name[1] == 0)
     {
-        const char char_names[] = "'-=[]\\,;\'./";
+        const char char_names[] = "`-=[]\\,;\'./";
         const int char_keys[] = { GLFW_KEY_GRAVE_ACCENT, GLFW_KEY_MINUS, GLFW_KEY_EQUAL, GLFW_KEY_LEFT_BRACKET, GLFW_KEY_RIGHT_BRACKET, GLFW_KEY_BACKSLASH, GLFW_KEY_COMMA, GLFW_KEY_SEMICOLON, GLFW_KEY_APOSTROPHE, GLFW_KEY_PERIOD, GLFW_KEY_SLASH, 0 };
         IM_ASSERT(IM_ARRAYSIZE(char_names) == IM_ARRAYSIZE(char_keys));
         if (key_name[0] >= '0' && key_name[0] <= '9')               { key = GLFW_KEY_0 + (key_name[0] - '0'); }
diff --git a/imgui.cpp b/imgui.cpp
index bf2452d..c6104dc 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -6099,7 +6099,6 @@
         // UPDATE CONTENTS SIZE, UPDATE HIDDEN STATUS
 
         // Update contents size from last frame for auto-fitting (or use explicit size)
-        const bool window_just_appearing_after_hidden_for_resize = (window->HiddenFramesCannotSkipItems > 0);
         CalcWindowContentSizes(window, &window->ContentSize, &window->ContentSizeIdeal);
         if (window->HiddenFramesCanSkipItems > 0)
             window->HiddenFramesCanSkipItems--;