Add BorderLeftWidth, BorderRightWidth, BorderLeftWidth, BorderLeftColor and BorderRightColor

.BorderLeftWidth(@value) when (@direction = @ltr) {
    border-left-width: @value;
}
.BorderLeftWidth(@value) when (@direction = @rtl) {
    border-right-width: @value;
}
.BorderRightWidth(@value) when (@direction = @ltr) {
    border-right-width: @value;
}
.BorderRightWidth(@value) when (@direction = @rtl) {
    border-left-width: @value;
}

.BorderLeftColor(@value) when (@direction = @ltr) {
    border-left-color: @value;
}
.BorderLeftColor(@value) when (@direction = @rtl) {
    border-right-color: @value;
}
.BorderRightColor(@value) when (@direction = @ltr) {
    border-right-color: @value;
}
.BorderRightColor(@value) when (@direction = @rtl) {
    border-left-color: @value;
}