Fixes #1697

It is possible to have an invalid config from a previous upgrade

Fixes #1715

The API uses Platform::String^. String's constructor takes in char16*.

Fixes #1755

Despite what g_convert_with_iconv's docs say, it does not reset the converter on a failed conversion (iconv returns -1).

Fixes #1758

Closes #1750

This allows us to omit the lagometer timer in the event that it is not
enabled, bringing the baseline wake-up rate down to 1Hz from 2Hz, which
could bring considerable power savings on mobile devices.

This should mean that hexchat never *needs* to wake-up unless prompted
by socket activity (assuming that the lag-o-meter is not enabled).

This should allow the operating system to be a bit more lax about
timeouts, allowing more efficient power management.

Just involves a bit of refactoring.

This allows individual preferences to take action when their value is
changed.

Signed-off-by: Ben Gamari <ben@smart-cactus.org>

This ensures that changes will take effect without a restart.

This adds the Ctrl+R keybinding by default to insert \026, the
character used for the reverse video text attribute.

- ^O is \017
- ^B is \002
- ^C is \003
- ^] is \035
- ^_ is \037
- ^V is \026

See ASCII(7) for an octal and hexadecimal table.

Fixes #1746
Closes #1747

Closes #1705

Fix "Implicit declaration of function exit" compile error

Closes #1770

Multiple offers for the same file are resumable. Attempts to resume more
than one of the offers causes the other offers to start a new file.

Closes #1764
Fixes #1763

It just duplicates functionality and this fixes:

- alert_taskbar chanopt not being respected
- tab color being incorrect when highlight print events are eaten

This probably doesn't catch them all but setting tab color
and printing text at least do not crash in the common case.

This is currently an issue when building in Flatpak

On failure it should always return -1, atoi() returns 0.

Fixes #1785

This relied on undocumented behavior of hexchat_pluginpref_get_int()
that has been fixed recently. -1 is the correct failure value.

I can't really think of a reason this would be needed
and since it doesn't do anything, and didn't since xchat,
 might as well remove it.

Fixes #1759

This is just a direct port and should change no logic

This just cleans up the results of git logs