Allows for matrix commands in inline math

[AJCubed]

Resolves #262.

Removes the newlines from the matrix snippet expansion while in inline mode, and allows the tab/enter keys insert & or \ to even if you're inline. Under the new behavior, shift-tab will bring the cursor to the next tabstop, and shift-enter will move the cursor to the next line.

Demo: https://github.com/artisticat1/obsidian-latex-suite/assets/64773493/130d8ad9-e9ff-4104-a589-a6af14ee8f2a