relabel control buttons to accurately reflect current functionality
relabel control buttons to accurately reflect current functionality

Added "Walls" to show that Reset resets not the colored squares, but the walls.
Added "Search" because it looks weird if one button is bigger than the others.
Changed "Reset" to "Clear" to indicate that walls disappear, but the start and end positions are not moved.
radify/PathFinding.js,radify/PathFinding.js