Feature Request: Remember docked dialog dimensions
Migrated from: https://bugs.launchpad.net/inkscape/+bug/1776176
#### Steps to reproduce:
- Open Inkscape with any dialog(s) open and docked.
- Drag dialogs to make the dock larger
- Restart.
#### What happened?
Dock width is not remembered.
Docked dialog dimensions are not remembered.
#### Inkscape Version and Operating System:
- 1.0alpha master, Linux Mint 19.1
- 0.91 r13725 on Ubuntu 16.04.
| Before restart | After restart |
| --- | --- |
|  |  |
|  |  |
issue