Remaining UI/UX issues

General:

• Many app freeze/deadlock/crash to fix

In about dialog:

• Version codename should not be translatable
• Changelog should be updated and only include latest changes
• Company name is "Savoir-faire Linux Inc."

Settings/chatview:

• scrollarea should be as large as the window

Pendant un appel:

• context menu should not suggest to place call and should allow to hangup
• Call menu too small to read action texts
• Change record icon and place video call icon
• Don't show plugin menu item if no plugins are available

• Preview way too big