Store captured packages in a temporal file

* Code cleanup to remove unwanted spaces
* Store information in a temporal pcap file (can be disabled)
Added a new panel to copy tempfile to another location
New UI for save raw messages to file
Avoid using mktemp for temporal filename
Recoded Call flow raw window to wrap text and be resizable
Added a custom keybind (I) for fast INVITE filter
Fixed Call Flow raw panel word wrapping
Fixed backspace for some terminals in Filters panel
Added more keybindings to help and fix backspace in forms
Center exit confirmation dialog