Added TextBoxWidget.has_split_inside_word flag

Used by coverbrowser's Text covers to choose the best font size.

frontend/ui/widget/textboxwidget.lua

@@ -138,6 +138,9 @@ function TextBoxWidget:_splitCharWidthList()
                 -- either a very long english word ocuppying more than one line,
                 -- or the excessive char is itself splittable:
                 -- we let that excessive char for next line
+                if adjusted_idx == offset then -- let the fact a long word was splitted be known
+                    self.has_split_inside_word = true
+                end
                 cur_line_text = table.concat(self.charlist, "", offset, idx - 1)
                 cur_line_width = cur_line_width - self.char_width_list[idx].width
             elseif c == " " then