[ Improvement ] Themes and icons integration

[89luca89]

Until version 1.0.2 there was a rudimental integration between host's custom themes and icons and the container using symlinks:

ln -s /run/host/usr/share/themes/* ~/.themes

same with icons

ln -s /run/host/usr/share/icons/* ~/.icons

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This has been removed in version 1.0.3 as it is not a solution I like nor it is solid enough I would like to find a solution that is solid enough to not spit confusing errors when using multiple distroboxes and mix and matching different containers

[Meister1593]

This works if application uses standard paths, but for some apps (like Webex) it's not the case It uses custom path for icon from inside container that cannot be resolved outside

[Desktop Entry]
Version=42.5.0.22187
Name=Webex  (on fedora-36)
Comment=Webex
Exec=/home/plyshka/.local/bin/distrobox-enter -n fedora-36 -- '  /opt/Webex/bin/CiscoCollabHost  %U'
Icon=/opt/Webex/bin/sparklogosmall.png
Terminal=false
Type=Application
Categories=Utility;Application;
MimeType=x-scheme-handler/webexteams
StartupWMClass=webex

Or some apps (like steam) don't even use paths and straight use name for icon (although it can be different name, steam flatpak for example takes icon from place like this: /home/plyshka/.local/share/flatpak/exports/share/icons/hicolor/16x16/apps/com.valvesoftware.Steam.png)

[Desktop Entry]
Name=Steam (Runtime)  (on arch)
Comment=Application for managing and playing games on Steam
Comment[pt_BR]=Aplicativo para jogar e gerenciar jogos no Steam
...
...
Comment[vi]=Ứng dụng để quản lý và chơi trò chơi trên Steam
Exec=/usr/bin/distrobox-enter -T -n arch -- "  /usr/bin/steam-runtime  %U"
Icon=steam
Terminal=false
Type=Application
Categories=Network;FileTransfer;Game;
MimeType=x-scheme-handler/steam;x-scheme-handler/steamlink;
Actions=Store;Community;Library;Servers;Screenshots;News;Settings;BigPicture;Friends;
PrefersNonDefaultGPU=true
X-KDE-RunOnDiscreteGpu=true

[Meister1593]

Oops, gonna move this into separate issue