- Style all button and inputs on admin pages with Roboto Mono font (and
sans-serif as a fallback) with 1em font size;
- Remove unneeded transition effect property declaration on text hover, as the
regular declaration is applied when switching from hover state to regular
state.
- Add NPC dedicated stylesheet in which specific NPC style has been added;
- Use an icon where the picture of a NPC is not available (like when adding a
new one) and provide the NPC picture as the picture instead of the edition page
itself;
- Move NPC's JavaScript in a dedicated file, improve its code and fix its
access to DOM elements.
