This fixes an issue with an outdated version of elfutils in the appimage.

Features

• add tab width setting (0cdebbb), closes #583
• bundle qt platform plugins (e291eef), closes #554

Bug Fixes

• add a wrapper for std::valarray to catch out of range access (d8de369), closes #629
• can't select directory in unwind->sysroot (f6a4e8f), closes #645
• clear flamegraph background in 5.15.12 (8e54107), closes #624
• crash in disassembler on hover (4cfdd11), closes #642
• don't show ansi escape sequences in tooltip (ed8cf88)
• update elfutils to 0.190 (e4ac31e)