Fix for alysum minic promo slider: Data too long for column 'effect' at row 1

fix prestashop alysum theme promo slider

Fresh install of prestashop 1.6.0.9 and Alysum theme 3.1.
Error: `Data too long for column 'effect' at row 1`

Failing sql query:
```
INSERT INTO `ps_minic_options` (
					`id_shop`, `effect`
				) VALUES (
					1,
					"random,simpleFade, curtainTopLeft, curtainTopRight, curtainBottomLeft, curtainBottomRight, curtainSliceLeft, curtainSliceRight, blindCurtainTopLeft, blindCurtainTopRight, blindCurtainBottomLeft, blindCurtainBottomRight, blindCurtainSliceBottom, blindCurtainSliceTop, stampede, mosaic, mosaicReverse, mosaicRandom, mosaicSpiral, mosaicSpiralReverse, topLeftBottomRight, bottomRightTopLeft, bottomLeftTopRight, bottomLeftTopRight");
```

Problem is `effect` column is too narrow, see here:
```
irb(main):001:0> "random,simpleFade, curtainTopLeft, curtainTopRight, curtainBottomLeft, curtainBottomRight, curtainSliceLeft, curtainSliceRight, blindCurtainTopLeft, blindCurtainTopRight, blindCurtainBottomLeft, blindCurtainBottomRight, blindCurtainSliceBottom, blindCurtainSliceTop, stampede, mosaic, mosaicReverse, mosaicRandom, mosaicSpiral, mosaicSpiralReverse, topLeftBottomRight, bottomRightTopLeft, bottomLeftTopRight, bottomLeftTopRight".size
=> 427
```

Fix is to update pk_promominicslider.php line 54, change effect from varchar 300 to something larger than 427, say 600.
```
...
CREATE TABLE `'._DB_PREFIX_.'minic_options` (
					`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
					`id_shop` int(10) unsigned NOT NULL,
					`effect` VARCHAR(600),
...
```