Data Grid - issues resizing width of columns and with data refresh and sort

SQLDeveloper 1215 on Windows XP professional
Database : various 9.2
In the table data tab there are a few minor issues our developers have highlighted.
1) There seems to be a minimum column width in the data display. This restricts flexibility in reviewing the data, esp. where the data length is less than the minimum column width.
2) If a column is resized or the column order is changed and a refresh or a new filter is applied then the columns are restored to their original position and size making it frustrating to run more than one query via the GUI.
3) There is no quick sort option by clicking on the column heading which would be useful.

I am still seeing this minimum column width in SQL Developer production (v1467) and I haven't seen any other posts relating to this. I have seen this all of the grids that I have looked at, including all of the grid based sub-tabs for the Object tabs (ie Columns, Data, Indexes, Constraints, etc) and the SQL Worksheet results tab.
It is very obvious with the Column Name and Data Type columns of the Table Columns tab - the Column Name column can be shrunk to truncate values but the Data Type column can only be shrunk to about the twice the width of the widest value.
Can anyone in development provide any comments about why we have this minimum width and how the minimum width is actually calculated?

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2.if i click the close button want to close all data grid ,its working perfectly.
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<?xml version="1.0" encoding="utf-8"?>
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"
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xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%" >
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Data Grid - issues resizing width of columns and with data refresh and sort

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