Add strip HTML possiblity to Geshi dialog. 

Strip HTML is useful when pasting code from other site, even when it uses Geshi as well. It has similar effect to pasting clean text from text editor like Gedit or Notepad++.  Just paste code from browser to fckgLite editor, select it and run Geshi with stripping HTML.

Add saving / restoring from cookie last selected lang in Geshi dialog.

Fix indentation around my changes.