Enable confirm quit by default

[dineshKumar777]

What kind of change does this PR introduce?

• Refactor

Did this PR introduce a breaking change?

• No

This is the default behaviour in nvim-qt. So enabled it by default.
#1247 - original PR with flag.

[MultisampledNight]

Thank you! While I understand the motivation, I think it's a bit overkill to disallow non-confirmed exit. Even browsers and large IDEs allow ignoring the confirm popup if they really want to.

So I think it'd be preferable to just change the default of the variable to 1 instead of 0.

[dineshKumar777]

@MultisampledNight
Most IDE and Editor(vscode, visual studio, jetbrains IDE) which i used doesn't support non-confirmed exit. can you give any other IDE which supports this!!
Sublime is the only editor which i know supports non-confirmed exit but that will preserve my changes on next launch.

but here we are losing data when we accidentally close the window. also this is the default behaviour with nvim-qt too. All i am looking for is better defaults.

EDIT: to be sure, this confirm quit happens only when you have unsaved changes. Otherwise it will exit as normal

[MultisampledNight]

PyCharm community allows doing so, under Appearance & Behavior > System Settings and then Confirm before exiting the IDE. I didn't mean to disable the behavior at all, just to keep it configurable in case a user (such as me) doesn't want that, I probably misworded my first comment. But at the moment the PR is enforcing the behavior, ignoring the value of g:neovide_confirm_quit.

[dineshKumar777]

Now its configurable.
Confirm_quit is enabled by default for any unsaved changes.
to disable, we can disable by :let g:neovide_confirm_quit=0 or v:false

[MultisampledNight]

(rebased to resolve the merge conflict)