tweak dialog chatboxes

[SimpleBrian]

not exactly a overhaul, just a bunch of tweaks here and there to improve the appearance of the chatboxes.

• tweaked chatbox designs.

before:

after:

• added check on whether the player is speaking, and to use the player's chatbox.
• this also means i had to adjust the code so that it no longer flips the chatbox horizontally.
• AND tweaked the speaker's name's position to align correctly with the new element.

• added and changed dialog text from arial to anke.
• slightly tweaked text dialog's position.
• hacky code to replace "Click to continue..." with a minimalistic continue icon (should scale with monitor resolution AND aspect ratio).

before:

after:

in-game video example:

some dialogs may overflow the chatbox, as well as covering the continue icon in the process, but it hopefully shouldn't be too much of an issue.