Add #version 120 to make shaders work on Windows

USL-32

plugins/LayerView/layers.shader

@@ -1,5 +1,6 @@
 [shaders]
 vertex =
+    #version 120
     uniform highp mat4 u_modelViewProjectionMatrix;
     uniform lowp float u_active_extruder;
     uniform lowp float u_shade_factor;
@@ -28,6 +29,7 @@ vertex =
     }
 
 fragment =
+    #version 120
     varying lowp vec4 v_color;
     varying float v_line_type;
 

plugins/LayerView/layerview_composite.shader

@@ -1,5 +1,6 @@
 [shaders]
 vertex =
+    #version 120
     uniform highp mat4 u_modelViewProjectionMatrix;
     attribute highp vec4 a_vertex;
     attribute highp vec2 a_uvs;
@@ -13,6 +14,7 @@ vertex =
     }
 
 fragment =
+    #version 120
     uniform sampler2D u_layer0;
     uniform sampler2D u_layer1;
     uniform sampler2D u_layer2;

resources/shaders/grid.shader

@@ -1,5 +1,6 @@
 [shaders]
 vertex =
+    #version 120
     uniform highp mat4 u_modelViewProjectionMatrix;
 
     attribute highp vec4 a_vertex;
@@ -14,6 +15,7 @@ vertex =
     }
 
 fragment =
+    #version 120
     uniform lowp vec4 u_gridColor0;
     uniform lowp vec4 u_gridColor1;
 

resources/shaders/overhang.shader

@@ -1,5 +1,6 @@
 [shaders]
 vertex =
+    #version 120
     uniform highp mat4 u_modelMatrix;
     uniform highp mat4 u_viewProjectionMatrix;
     uniform highp mat4 u_normalMatrix;
@@ -21,6 +22,7 @@ vertex =
     }
 
 fragment =
+    #version 120
     uniform mediump vec4 u_ambientColor;
     uniform mediump vec4 u_diffuseColor;
     uniform mediump vec4 u_specularColor;

resources/shaders/striped.shader

@@ -1,5 +1,6 @@
 [shaders]
 vertex =
+    #version 120
     uniform highp mat4 u_modelMatrix;
     uniform highp mat4 u_viewProjectionMatrix;
     uniform highp mat4 u_normalMatrix;
@@ -23,6 +24,7 @@ vertex =
     }
 
 fragment =
+    #version 120
     uniform mediump vec4 u_ambientColor;
     uniform mediump vec4 u_diffuseColor1;
     uniform mediump vec4 u_diffuseColor2;

resources/shaders/transparent_object.shader

@@ -1,5 +1,6 @@
 [shaders]
 vertex =
+    #version 120
     uniform highp mat4 u_modelMatrix;
     uniform highp mat4 u_viewProjectionMatrix;
     uniform highp mat4 u_normalMatrix;
@@ -21,6 +22,7 @@ vertex =
     }
 
 fragment =
+    #version 120
     uniform mediump vec4 u_ambientColor;
     uniform mediump vec4 u_diffuseColor;
     uniform highp vec3 u_lightPosition;