Searchbox and misc. fixes

If you already have v1.3.0 or v1.3.1 download the appropriate patch file and extract the contents to your Pulsarc directory.

Changed

• Backspace gets rid of the last character instead of clearing the searchbox.
• Pressing escape clears the searchbox if there is text in it. When there's no text, pressing escape quits to the main menu.

Fixed

• Searchbox entering the names of keys instead of proper typing (i.e. "space", "leftalt") Thanks Iso#1187 on Discord
• Positioning of the elements on ScoreCards and the Grade on the result screen.
• Leaderboards only showing at max the same amount of ranks as there were beatmap cards on the screen.
• Sliders not dragging. Thanks Iso#1187 and BluefireMeit#5957 on Discord for their input.