GUI: Streamline Properties Widget. Closes #2159

Merge select buttons and filtering into one line
Add hotkeys and buttons for Top and Bottom priorities
Merge pull request #2206 from alfrix/prio_buttons

Add top and bottom priority hotkeys and buttons to menu and toolbar
Follow project coding style. Issue #2192.
Fix backtrace generation on Mingw: to resolve local functions we need to export them
Fix indentation for long addresses and filenames
Merge pull request #2210 from alfrix/gui_fix

GUI: Streamline Properties Widget. Closes #2159
Produce demangled backtraces under MinGW
Always disable ASLR for debug builds - otherwise debugging will fail
Merge pull request #2214 from Gelmir/trace

Fix backtrace functionality under MinGW