Escaping the osascript commands requires two layers of escaping: One for the
script itself, and one for the sh arguments.
For the script itself, we simply have to escape the " character with \". When
then take the result of that and escape it sutably for sh arguments in single
quotes. We already have a function for that so we simply call that to do the
job.
Fairly straight forward, the Powershell code was fundimentally just
calling Shell_NotifyIcon under the covers which we can easily do
ourself. The notification has to be tied to a window, so I simply create
a hidden one to use.
A nice improvement here is that instead of having to use the Powershell
icon we can make use of the EXE icon if one was provided. If one is not
provided then we use the default 'application' icon.
tinyfiledialogs had lots of issue surounding the quoting of the
arguments to the dialog functions. The arguments are effectively placed
verbadim into shell commands, and without any proper treatment they
would get accidentally evaluated by the shell, which is a big problem.
Additionally, any arguments containing quotes would just not work since
they would screw up the underlying shell command.
This change fixes all that for Linux. Every argument to the dialog
functions is now surrounded in single quotes, which prevents any
evaluation of the string by the shell. Additionally, because this is
standard the only chracters that need special treatment are the single
quote characters, and proper escaping for them has been added. The
result is that the dialog functions can now accept arguments that hvae
single and double quotes in them (on Linux).
