Squish a Bunch of Clippy Errors and Warnings

[Pi-Cla]

There are some remaining such as these:

error: &-masking with zero
   --> wezterm-input-types/src/lib.rs:479:1
    |
479 | / bitflags! {
480 | |     #[cfg_attr(feature="serde", derive(Serialize, Deserialize))]
481 | |     #[derive(Default, FromDynamic, ToDynamic)]
482 | |     #[dynamic(into="String", try_from="String")]
...   |
498 | |     }
499 | | }
    | |_^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bad_bit_mask
    = note: `#[deny(clippy::bad_bit_mask)]` on by default
    = note: this error originates in the macro `__impl_bitflags` which comes from the expansion of the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)

error: &-masking with zero
    --> wezterm-input-types/src/lib.rs:1174:1
     |
1174 | / bitflags! {
1175 | |     #[derive(Default)]
1176 | |     pub struct MouseButtons: u8 {
1177 | |         const NONE = 0;
...    |
1184 | |     }
1185 | | }
     | |_^
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bad_bit_mask
     = note: this error originates in the macro `__impl_bitflags` which comes from the expansion of the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
...

But I got rid of a lot of them