Doc Switcher window icons have problems when Tab Bar 'Reduce' setting changed

[sasumner]

Description of the Issue

When the Preferences > General > Tab Bar > Reduce setting is changed, the icons in the window with title Doc Switcher have display issues, until a Notepad++ restart is done.

Steps to Reproduce the Issue

1. In Preferences > General, tick the Show box for Document List Panel
2. Restart Notepad++, observe window called Doc Switcher on lefthand side
   Observe the icons for "new 1" in both the tab bar and the Doc Switcher window
3. In Preferences > General > Tab Bar, untick the Reduce box
   Observe that tab bar icon for "new 1" tab has increased in size
   Observe that icon for "new 1" in Doc Switcher window has NOT increased in size
4. Click on the "new 1" text in the Doc Switcher window
   Observe that the available space for the icon has NOT increased, but the icon image HAS increased in side so it is now ILL-FITTING!:
   
5. In Preferences > General > Tab Bar, tick the Reduce box
   Observe that tab bar icon for "new 1" tab has decreased in size
   Observe that icon for "new 1" in Doc Switcher window has NOT changed
6. Click on the "new 1" text in the Doc Switcher window
   Observe that the icon has now DISAPPEARED!:
   

Expected Behavior

• After step 4, the available space for the icon becomes enlarged so that the entire non-Reduce'd icon fits.
• After step 6, the icon doesn't disappear but rather appears and is sized correctly to a Reduce'd icon size.
• In general, icons to change size in synchrony, and to not disappear of be poorly fit to the available space.

Actual Behavior

See most of the "Observe" comments in the "Steps to Repro" above, especially ones with ALL CAPS and BOLD.

Additional Information

After a restart of Notepad++, all is fine with Reduce 'd icons, if Reduce was ticked at the prior exiting of Notepad++:

After a restart of Notepad++, all is fine with non- Reduce 'd icons, if Reduce was unticked at the prior exiting of Notepad++:

Debug Information

Notepad++ v7.8.5 (64-bit)
Build time : Mar 4 2020 - 11:08:34
Path : C:.......\npp.7.8.5.bin.x64\notepad++.exe
Admin mode : OFF
Local Conf mode : ON
OS Name : Windows 10 Enterprise (64-bit)
OS Version : 1809
OS Build : 17763.1039
Plugins : mimeTools.dll NppConverter.dll NppExport.dll

[ArkadiuszMichalski]

Same for me (looks like step 2. is unnecessary):

Notepad++ v7.9 (32-bit)
Build time : Sep 22 2020 - 03:24:22
Path : D:_test\NPPClean\notepad++.exe
Admin mode : ON
Local Conf mode : ON
OS Name : Windows 7 Ultimate (64-bit)
OS Build : 7601.0
Current ANSI codepage : 1250
Plugins : none

Another STR (all action in Prefs window, witohut click on Document List Panel):

1. Turn on Document List Panel.
2. Turn of Reduce.
3. Turn off and on Document List Panel.
4. Trun on Reduce
5. Turn off and on Document List Panel.

and repeat 2-5.

By the way I also checked Window manager plugin and problem not exist (i.e. resizing the tabs doesn't work in panel, but the icon does not disappear). Additional info for those who still use this plugin.