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[BUG] Changing toolbar icon set doesn't change to matched panel icon set #16595

@donho

Description

@donho

Is there an existing issue for this?

  • I have searched the existing issues

Description of the Issue

Indistinguishable icons for Notepad++'s built-in docks like: Document Map, Project Panel, ASCII Codes Panel, Functions List
when user switches between dark and light modes.

Issue from:
#16548 (comment)

Steps To Reproduce

  1. Switch between dark and light modes.
  2. Choose one of the Fluent icon options in Preferences » Toolbar.
  3. Open some of the Notepad++ built-in dock panels mentioned above. Preferably stack them all along one side. If you had started Notepad++ in light mode, you would see this in the dock panel tab selection area:
    image
  4. Switch to Dark mode. You will now see this in the dock panel tab selection area:
    image

Current Behavior

Showing in 4 as above.

Expected Behavior

The icons should be visible.

Debug Information

Notepad++ v8.8.1   (64-bit)
Build time : May 27 2025 - 13:27:18
Scintilla/Lexilla included : 5.5.6/5.4.4
Boost Regex included : 1_85
Path : C:\sources\notepad-plus-plus\PowerEditor\bin64\Notepad++.exe
Command Line : 
Admin mode : OFF
Local Conf mode : OFF
Cloud Config : OFF
Periodic Backup : ON
Placeholders : OFF
Scintilla Rendering Mode : SC_TECHNOLOGY_DIRECTWRITE (1)
Multi-instance Mode : monoInst
File Status Auto-Detection : cdEnabledNew (for current file/tab only)
Dark Mode : OFF
Display Info : 
    primary monitor: 3840x2160, scaling 200%
    visible monitors count: 1
    installed Display Class adapters: 
        0001: Description - NVIDIA GeForce RTX 3070 Laptop GPU
        0001: DriverVersion - 32.0.15.6641
        0002: Description - Intel(R) UHD Graphics
        0002: DriverVersion - 31.0.101.5186
    - warning, search has been limited to maximum number of adapter records: 4
OS Name : Windows 11 Home (64-bit)
OS Version : 24H2
OS Build : 26100.4061
Current ANSI codepage : 1252
Plugins : 
    LuaScript (0.12)
    NppPluginDemo (4.4)
    NppPluginTemplate (4.4)
    Papyrus (1.2.2.354)

Anything else?

No response

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