correctly find gnupg module
fix preference window expand properties
don't try to create certificates if PyOpenSSL is not available
update contact instance in chat window when we talk to another resource. Fixes #7700
keep treeview consistent when connecting. Fixes #7434
rename some icons so we don't need to check in code if installed iconset has it. Fixes #7445
minimize groupchats before closing message window
rename gajim-security_high / low to security-high / low. see #7445
change icon of certificate Dialog. see #7445