QOL and fixes

Changes:

• When holding shift with the eraser or the pencil, a preview of the line will be shown
• When connecting affectors to other props, the connector line will have animated arrows to show the direction of flow
• Increased maximums for various props
• Grey out background labels when the settings prop is used
• Right click or left click with the prop tool will show the prop drawer if no prop is currently selected
• Prop tool will show a tooltip to indicate how to open the prop drawer
• Prop drawer will now appear at the center of the screen instead of world origin
• Tooltips for shortcuts are now shown in the escape menu in editor
• You can now click on a tool icon to select it
• Game will automatically scale to a multiple of the base game resolution to maintain pixel perfect visuals
• Numeric sliders can be incremented continuously by holding down right click
• Numeric sliders can be increment by 0.2 if left clicked
• Cannons can be turned off if they receive a signal
• Added ability to change the default map to play on when clicking Play in the main menu

Fixes:

• Fix invisible paints staying on the level when playtesting
• Fix inputs sometimes being carried over from map to level and vice versa
• Fix pistons not pushing over props in some cases

Added:

• Added fabricator prop - It will spawn a prop when its signal becomes true
• Added destroyer prop - It will anything except the player, once done so it will make a signal
• Added signal buffer prop - It will buffer any incoming signal, and output a signal with a delay