Update visual tests and samples with equivalent blur strength as before

Due to changing blur and drop-shadow filters to take standard deviation (sigma) instead of radius.

Samples/basic/effects/data/effects.rml

@@ -142,7 +142,7 @@
 			<tr><td>Contrast</td><td><input type="range" min="0" max="2" step="0.02" data-value="contrast"/></td><td>{{ contrast*100 }} %</td></tr>
 			<tr><td>Hue</td><td><input type="range" min="0" max="360" step="1" data-value="hue_rotate"/></td><td>{{ hue_rotate }} deg</td></tr>
 			<tr><td>Invert</td><td><input type="range" min="0" max="1" step="0.01" data-value="invert"/></td><td>{{ invert*100 }} %</td></tr>
-			<tr><td>Blur</td><td><input type="range" min="0" max="150" step="1" data-value="blur"/></td><td>{{ blur }} px</td></tr>
+			<tr><td>Blur</td><td><input type="range" min="0" max="50" step="1" data-value="blur"/></td><td>{{ blur }} px</td></tr>
 			<tr><td><label for="drop_shadow">Drop shadow</label></td><td colspan="2"><input id="drop_shadow" type="checkbox" data-checked="drop_shadow"/></td></tr>
 		</tbody>
 		<tbody data-if="submenu == 'transform'">

Tests/Data/VisualTests/filter_blur_area.rml

@@ -30,7 +30,7 @@
 			height: 300dp;
 			border-radius: 30dp;
 			margin: auto;
-			backdrop-filter: blur(50dp);
+			backdrop-filter: blur(25dp);
 		}
 	</style>
 </head>

Tests/Data/VisualTests/filter_blur_orb.rml

@@ -30,8 +30,8 @@
 			border-radius: 200dp;
 			margin: auto;
 			background: #fff0;
-			filter: drop-shadow(#ff7 0 0 30px) blur(40px);
-			backdrop-filter: blur(50px);
+			filter: drop-shadow(#ff7 0 0 30px) blur(20dp);
+			backdrop-filter: blur(25dp);
 			border: 2dp black;
 		}
 	</style>

Tests/Data/VisualTests/filter_overflow.rml

@@ -14,7 +14,7 @@
 		.parent {
 			background-color: red;
 			position: relative;
-			filter: blur(15dp);
+			filter: blur(10dp);
 		}
 		.child {
 			background-color: blue;

Tests/Data/VisualTests/filter_with_backdrop.rml

@@ -17,7 +17,7 @@
 			float: left;
 		}
 		.backdrop {
-			backdrop-filter: blur(10dp);
+			backdrop-filter: blur(5dp);
 		}
 		.filter {
 			filter: sepia(1);