Fix Download Events (#379) and add GetText/GetSource support!

[dhhunter]

Bump CefGlue (fixes context menu) and major version! Fix disposed error in Download Events & added DownloadItem Events (Fix #379)

Added GetText() (allows integration with AI assistants) & GetSource()

F12 now actually TogglesDeveloperTools

ocd corrected typos in some internal variables (sorry),

I will understand if you do not wish to accept all of my changes; however, the changes related to #379 and the GetText()/GetSource() are necessary for me to move forward with my own project.

Thank you very much for all your hard work on this project and GOD Bless! - Dean

[joaompneves]

Hi, Thanks you for your PR. Before moving forward please separate into multiple PRs, each feature or fix in its own PR.

[dhhunter]

@joaompneves I am really not looking forward to beating my head over GitHub; however, I am sure that I can figure it out eventually!