Fixes and improvements

[AsYlum-]

• Mass import plugin allows importing PNG and JPEG.
• Invalid entries in Animationlist.xml will now be skipped nad will result in a message about the problem.
• Multi editor now has additional form with shortcut list.
• Tiledata control now has additional form with some descriptions for fields and flags (data needs further updates).
• Option to change background color for some controls is now consolidated under options and is saved in profile file. You can still make adjustments from respective controls.
• Fix: added Gumplist.xml to UOFiddler main folder (missed in previous version).
• You can use F3 and Shift F3 to search next/previous in: Clilocs, Speech, Dress, Items, Land tiles, Sounds and Tiledata tabs.
• Map preview has new options to generate preview with altitude (little bit slow but works).