ConfigDialog: Check alt_name_text if name_text isn't set,

as it is used for the "Set as default" popup.
This allows having that text accurate on widgets without an
actual name_text (e.g., the font size wheel).

Fix #7231

Co-authored-by: Frans de Jonge <fransdejonge@gmail.com>

frontend/ui/data/creoptions.lua

@@ -337,6 +337,7 @@ Note that your selected font size is not affected by this setting.]]),
         options = {
             {
                 name = "font_size",
+                alt_name_text = _("Font size"),
                 item_text = tableOfNumbersToTableOfStrings(DCREREADER_CONFIG_FONT_SIZES),
                 item_align_center = 1.0,
                 spacing = 15,

frontend/ui/widget/configdialog.lua

@@ -472,7 +472,7 @@ function ConfigOption:init()
                     option_items[d] = option_item
                     option_item.items = option_items
                     option_item.name = self.options[c].name
-                    option_item.name_text = name_text
+                    option_item.name_text = name_text or self.options[c].alt_name_text
                     option_item.item_text = self.options[c].item_text
                     option_item.values = self.options[c].values
                     option_item.args = self.options[c].args
@@ -514,7 +514,7 @@ function ConfigOption:init()
                     option_items[d] = option_item
                     option_item.items = option_items
                     option_item.name = self.options[c].name
-                    option_item.name_text = name_text
+                    option_item.name_text = name_text or self.options[c].alt_name_text
                     option_item.values = self.options[c].values
                     option_item.args = self.options[c].args
                     option_item.event = self.options[c].event