[matter] catch OnlineMirrorError during entropysrv commit()
[solo.commands.*] properly use the return value of _install_action()
Removing Call to Deprecated vte_set_background_transparent()

For some reason this has recently been causing rigo not to start
in my system, but the fact that it is already deprecated should
be enough to just get rid of it.
Merge pull request #2 from dMaggot/master

Removing Call to Deprecated vte_set_background_transparent()
Release Entropy 217
Tagging Entropy version 217
[entropy.tools] remove unneeded .flush() calls
[entropy.qa] remove unneeded .flush() calls
[entropy.security] remove unneeded .flush() calls
[entropy.const] remove unneeded .flush() calls
[entropy.core] remove unneeded .flush() calls
[entropy.client.interfaces.client] remove unneeded .flush() calls
[entropy.client.interfaces.package] remove unneeded .flush() calls
[entropy.server.interfaces.db] remove unneeded .flush() calls
[entropy.server.interfaces.main] remove unneeded .flush() calls
[entropy.spm] PortagePlugin.xpak: remove unneeded .flush() calls
[entropy.spm] PortagePlugin: remove unneeded .flush() calls
[entropy.transceivers] remove unneeded .flush() calls
[matter] add Portagge backtrack info "needed_unstable_keywords" support
[solo.utils] enlightenatom: add slot substring support