make buttons look like buttons

app/src/main/java/com/geeksville/mesh/ui/Channel.kt

@@ -2,17 +2,22 @@ package com.geeksville.mesh.ui
 
 import androidx.compose.Composable
 import androidx.ui.core.Text
+import androidx.ui.foundation.Clickable
 import androidx.ui.foundation.DrawImage
 import androidx.ui.layout.*
 import androidx.ui.material.MaterialTheme
+import androidx.ui.material.ripple.Ripple
 import androidx.ui.res.imageResource
 import androidx.ui.tooling.preview.Preview
 import androidx.ui.unit.dp
+import com.geeksville.android.Logging
 import com.geeksville.mesh.R
 
 /// The Compose IDE preview doesn't like the protobufs
 data class Channel(val name: String, val num: Int)
 
+object ChannelLog : Logging
+
 @Composable
 fun ChannelContent(channel: Channel = Channel("Default", 7)) {
     val typography = MaterialTheme.typography()
@@ -30,12 +35,18 @@ fun ChannelContent(channel: Channel = Channel("Default", 7)) {
                 DrawImage(image = image)
             }
 
+            Ripple(bounded = false) {
+                Clickable(onClick = {
+                    TODO()
+                }) {
                     VectorImage(
                         id = R.drawable.ic_twotone_share_24,
                         modifier = LayoutGravity.Center + LayoutPadding(left = 8.dp),
                         tint = palette.onBackground
                     )
                 }
+            }
+        }
 
         Text(
             text = "Number: ${channel.num}",