This is a rework of the Preferences window

Glade-defined settings were replaced by list box settings. This makes maintenance easier.

What needs to be resolved

General notes

• Section headers are needed to separate different settings
• Comboboxes have relief, but should be flat (white background)
• Mnemonics in labels to activate settings? > can be added later

General page

• 'Merge Accounts' needs to be added (moved from accounts window)
• PEP display settings are not implemented yet (Location, Tune, Activity, Mood); separate switch for each of these settings? > separate settings for now

Chat page

• Display chatstates is not implemented yet (In Chat Tabs, In Chat Banner, and In Contact List; separate switch for each of these settings?) > separate settings for now
• Split Chat and Group chat settings to separate pages? > not necessarily needed

Notifications page

• Values for autopopup and notify_on_new_message are mixed in one combobox (this cannot be realized by the current setting type I think > yes, it can; fixed!)
• auto_popup_chat_opened is not implemented yet
• notification_sign_in and notification_sign_out: I would rather have one setting about sign in/out notifications > separate settings for now
• Sounds configuration missing (needs new setting: switch + button) > added via Callback setting

Status page

• Automatic status settings after timer; New setting type needed? > made it three list box rows
• restore_last_status is account-specific and should be moved to account settings (see !683 (merged))

Style page

• Manage Themes not implemented yet (css_config, New setting type needed: combobox + button) > added via Callback setting
• Dark theme setting does not get set correctly (always disabled, maybe int/str problem > fixed)
• Status icon set: custom renderer needed? > no custom renderer for now, just a plain combobox

Audio/video page

• Comboboxes are code-generated. How should we handle this? > adapt to new settings
• Live preview (+switch) are missing
• 'Use stun server' and server entry should be one listbox item > a single entry should be sufficient
• Re-implement infobar to show dependencies if missing (or windows running)

Advanced page

• Debug logging switch initial config value is not implemented yet (fixed)
• Debugging switch should additionally have a button which opens the logs folder (switch + button) > added Callback setting to open directory
• Use keyring switch is missing
• Update check switch is missing (enabled on Win/MacOS only)
• Button for resetting hints is missing > Callback setting
• ACE is just one button (needs a new setting type though) > Callback setting