fix(options): use SetSelectedID so the text-size dropdown selection sticks

ProfessionMenu/ProfessionMenuOptions.lua

@@ -150,8 +150,7 @@ PM:CreateOptionsUI()
 						text = i;
 						func = function()
 							PM.db.txtSize = i
-							local thisID = UIDropDownMenu_GetSelectedID(ProfessionMenuOptions_TxtSizeMenu)
-							UIDropDownMenu_SetSelectedID(ProfessionMenuOptions_TxtSizeMenu, thisID)
+							UIDropDownMenu_SetSelectedID(ProfessionMenuOptions_TxtSizeMenu, i - 9)
 						end;
 					};
 						UIDropDownMenu_AddButton(info);