Improve the visual ROP search

[radare]

• [ ] tab to toggle cursor from list of rops to ropchain to delete/move the gadgets from the ropchain list
• [ ] support browsing the rop gadget classifications
• [ ] support to save/restore ropchain to project or to commands (we need a command to add/delete gadgets, and print it, not just yank it)
• [ ] add support for testing the ropchain using ESIL or in debugger like it's done by rarop2
• [ ] add a key to enter emulation/debug mode to test the ropchain, maybe add support in ragg2/rarun2 to execute a ropchain (instead of hexpairs)

[XVilka]

See also:

• META - ROP
• ROP search is not very good
• ROP search using ESIL
• ROP search improvement
• ROP search is too slow

[radare]

i have improved it, but its still far from perfect