Apply explicit GUI scale as is

Explicitly chosen scale is no longer reduced to fit the open menu page
(2 stayed 1.5 in settings). Fitting to the window remains in auto mode.

res/layouts/pages/settings_display.xml.lua

@@ -11,12 +11,8 @@ end
 
 tostring_overrides["display.gui-scale"] = function(x)
     if x == 0 then
-        return string.format("%s (%d)", gui.str("Auto"), gui.get_max_scale())
-    end
-    local effective = gui.get_scale()
-    if effective ~= x then
-        -- menu is limited by window size
-        return string.format("%s (%s %s)", tostring(x), gui.str("Effective"), tostring(effective))
+        -- the scale chosen automatically for the current window
+        return string.format("%s (%s)", gui.str("Auto"), tostring(gui.get_scale()))
     end
     return tostring(x)
 end

res/texts/ru_RU.txt

@@ -13,7 +13,6 @@ Description=Описание
 Converting world...=Выполняется конвертация мира...
 Unlimited=Неограниченно
 Auto=Авто
-Effective=действует
 Chat=Чат
 Console=Консоль
 Log=Лог

src/graphics/ui/GUI.cpp

@@ -110,9 +110,10 @@ float GUI::calcScale(const glm::uvec2& viewport) const {
         ? static_cast<float>(calcMaxScale(viewport)) // auto
         : value;
 
-    // while a menu page is open, it must fit the window
+    // explicitly set scale is applied as is; in auto mode an open menu page
+    // must fit the window
     auto& page = menu->getCurrent();
-    if (page.panel) {
+    if (value <= 0.0f && page.panel) {
         auto size = page.panel->getSize();
         if (size.x > 0.0f && size.y > 0.0f) {
             float fit = std::min(viewport.x / size.x, viewport.y / size.y);