[eclipse-pmc] PMC bug fix request: to stop exception when importing requ

[Felipe Heidrich <Felipe_Heidrich@xxxxxxxxxx>]

GOALS/BENEFITS:

Here is the problem: On the Macintosh, the import wizard gets an exception
when importing plugins and fragments.

In 3.3 Table.remove(int, int) was not optimized and called remove(int) for
each item. This was fixed in 3.4 but a new bug was introduced. 
Table.remove(int)
updated pending operating system work before removing the item. When
Table.remove(int, int) was changed to no longer call Table.remove(int), 
the
pending work was not done, indices were wrong and an operating system 
error
happened.

There was a further problem that the pending work was not done when an 
item
was inserted in the middle of a table.

Note: Work was only pending when setRedraw(true) was called on a table. 
This
means that any client code that called setRedraw(true), added or removed 
items,
then called setRedraw(false), is affected.

ASSOCIATED BUGS:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=236669 (swt error removing 
items in wizard)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=184507 (optimization that 
caused the error)

RISKS:
Very Low. We are calling code that used to be called in 3.3 for every item 
(now we
are calling it once, before the remove() operation). 

PERFORMANCE IMPACT:
None.