Description:
Spinoff from bug 106154: Dialogs display in order of a second or two, especially when initiating dialog display :
- styles modify dialog
- character dialog ;
- paragraph dialog ;
- numbering and bullets (particularly slow);
- page dialog.

Displaying or removing the sidebar doesn't seem to make any noticeable difference.

There is a lag on Windows to, but - mostly - limited to the first opening. However, could be related to the screen resolution (https://ask.libreoffice.org/en/question/150823/extremely-slow-stylemodel-configuration-window/)

Steps to Reproduce:
1. Launch Writer
2. Open the sidebar -> Styles
3. Right click a style -> modify 
4. Close dialog; repeat step 3

Other dialogs more or less affected
- character dialog ;
- paragraph dialog ;
- numbering and bullets (particularly slow);
- page dialog.


Actual Results:  
Dialogs are opening slowly

Expected Results:
Fast and snappy dialogs


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 6.1.0.0.alpha0+
Build ID: fb29e6eeeaad5255bb924ff59162a83ed80bfb0a
CPU threads: 4; OS: Mac OS X 10.12.6; UI render: default; 
TinderBox: MacOSX-x86_64@49-TDF, Branch:master, Time: 2018-03-09_03:22:00
Locale: nl-NL (nl_NL.UTF-8); Calc: group


User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/603.3.8 (KHTML, like Gecko) Version/10.1.2 Safari/603.3.8