1. Properly keep track of alterations to DOM structure
so we do not end up with dangling or stale pointers
2. Properly implement logical order in insert/deleteRow.
   Also fix implicit body creation code for insertRow. 
   Essentially, improperly nested tr's are invisible to the DOM code
   (and in IE, they're even invisible on the screen!)
   
3. Be more robust, compatible with other browsers,
in handling of malformed dom-created tables:
    -Ignore <tr>'s directly under table in the rows collection
    -In tsection code do not assume only <tr>'s will be there
    
BUG: 119697
BUG: 100105

svn path=/branches/KDE/3.5/kdelibs/; revision=515817