[lookandfeel] Only constant globals in shader code for GL ES compatibility

Globals need to be constant in shader code for some GL ES versions.
Otherwise leads to non-compiling shader.

Reviewers: #plasma, davidedmundson

Reviewed By: #plasma, davidedmundson

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D9158

lookandfeel/contents/components/UserDelegate.qml

@@ -103,7 +103,7 @@ Item {
                         uniform lowp vec4 colorBorder;
                         highp float blend = 0.01;
                         highp float innerRadius = 0.47;
-                        highp float outerRadius = innerRadius + 0.02;
+                        highp float outerRadius = 0.49;
                         lowp vec4 colorEmpty = vec4(0.0, 0.0, 0.0, 0.0);
 
                         void main() {