Convert old dialogs to dockable dialogs

Other dialogs that can't be docked:

- Gradient Editor (bug #390458)
- Export Bitmap (bug #390458)
- Tiled Clones (bug #251674)
- XML Editor
- Object Properties

… continued:

- Image Properties
- Find dialog
- Check spelling

Object properties dialog now dockable

> Object properties dialog now dockable

Changed in revision 10862:
<http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/10862>

Image attributes and Link attributes are now diable (trunk revision 10910)

Current to do list:
- Text and font settings
- Check spelling
- XML Editor
- Find dialog
- Gradient Editor (bug #390458)
- Export Bitmap (bug #390458)
- Tiled Clones (bug #251674)

with regard to
- Find dialog
please coordinate with
Bug #909328 “Find / Replace dialog” (WIP)
<https://bugs.launchpad.net/inkscape/+bug/909328>

Current to do list (cont.):
- Extensions dialog with options from the INX file (bug #929361)

Update:
- Text and font settings (bug #930535)

Patch for Text and font added to bug #930535.

Current to do list:
- Check spelling
- XML Editor
- Find dialog (to coordinate with Bug #909328 “Find / Replace dialog” (WIP))
- Gradient Editor (bug #390458)
- Export Bitmap (bug #390458)
- Tiled Clones (bug #251674)
- Extensions dialog with options from the INX file (bug #929361)

A rewrite of the Gradient Editor dialog needs to be done before anyone worries about docking. As I've mentioned previously on the mailing list, if the dialog doesn't get a rewrite during the 0.49 dev cycle, it will be disabled prior to release (it's pretty broken right now and hasn't been maintained over the years).

While the gradient editor does need a rewrite, it appears that the broken behavior issues are due to a disconnect between the canvas and the editor. Making it dock prior to a rewrite would be acceptable in this case.

SpellCheck (bug #934721) in progress.

In progress:
- Check spelling
- Find dialog (to coordinate with Bug #909328 “Find / Replace dialog” (WIP))
- Gradient Editor (bug #390458)
- Export Bitmap (bug #390458)

Current to do list:
- XML Editor
- Tiled Clones (bug #251674)
- Extensions dialog with options from the INX file (bug #929361)

SpellCheck (bug #934721) commited
Export Bitmap (bug #390458) needs testing
XML Editor (bug #940715) in progress

Export Bitmap (bug #390458) committed.
XML Editor (bug #940715) committed.

Gradient Editor (bug #950677) - may be disabled

In progress:
- Find dialog (Bug #909328) - in test, about to commit
- Gradient Editor (bug #390458) - may be disabled

Current to do list:
- Tiled Clones (bug #251674)
- Extensions dialog with options from the INX file (bug #929361)

Find dialog (Bug #909328) committed.
Tiled Clones (bug #251674) committed.

Update: "Extensions dialog with options from the INX file (bug #929361)" is the last remaining item thanks to all fixes ofJohn.

1 added to the list, 2 remaining:
- bug #1035013: make guides dialog dockable
- bug #929361: extensions dialog with options from the INX file

The font dialog really needs to be dockable. Perhaps at the bottom of the window. So long as it doesn't auto resize like it does now :)

@Roland - Most dialogs (including the Text and fonts dialog) are dockable in Inkscape 0.91.
The only remaining non-dockable dialog types are listed in comment #21 (see follow-up reports).