(In revision:1562) Corrected various forms on the configuration pages to correctly use the 'required' attribute. Firefox 4 will not allow a form to be submitted if an empty/not selected item is marked as required.

Fixes* 252

(In revision:1564) On the Internet Radio configuration page the Image Filename is now not required.

refs #252

Updating tickets (#218, #220, #226, #231, #236, #239, #240, #242, #247, #252)

Updating tickets (#63, #65, #75, #84, #87, #89, #93, #185, #10, #57, #64, #69, #70, #74, #79, #80, #82, #83, #85, #86, #88, #90, #91, #96, #97, #98, #99, #100, #101, #104, #105, #109, #115, #116, #117, #120, #126, #128, #130, #131, #133, #135, #153, #163, #169, #171, #173, #179, #180, #181, #184, #187, #188, #194, #195, #198, #203, #205, #218, #220, #226, #231, #236, #239, #240, #242, #247, #252, #5, #6, #11, #20, #25, #26, #27, #29, #30, #38, #40, #42, #43, #44, #46, #49, #50, #51, #52, #53, #55, #58, #59, #60, #61, #71, #92, #102, #103, #106, #107, #108, #112, #113, #114, #118, #119, #121, #129, #137, #140, #141, #144, #145, #146, #147, #149, #150, #151, #152, #154, #156, #157, #158, #160, #161, #162, #165, #167, #168, #172, #176, #182, #183, #191, #192, #193, #196, #197, #204, #206, #210, #215, #217, #222, #228, #230, #232, #234, #235, #237, #243, #249, #1, #4, #9, #12, #13, #16, #62, #78, #164, #166, #189, #190, #199, #200, #208, #209, #211, #212, #19, #47, #48)