UI feedback

Console:
- Increase contrast of table rows on profile/tunnels/peers tables
- Changed pink font to magenta in /logs to increase legibility
- Soften H3 headings in sidebar
- Single click to select I2P Version and Running Environment table text, with
  table:hover color change and text cursor to better reflect selection
  - Modify text above to indicate what exactly needs to be included in logs
- Reduce size of monospace dests in peers/profiles/tunnels, add additional
  spacing (responsive)
- Fix resizing of sidebar reseed button
- De-emphasise siderbar app icons with background-blend-mode: luminosity
- Change sidebar snark icon to match homepage icon
- Bump div.main text color from #222 to #333 (reduce contrast)

i2ptunnel: Increase vertical spacing of H2/H3's

SusiDNS: Change address helper icon to add book icon

i2psnark:
- Remove font-adjust-size (ubergine/vanilla)
  - Was probably causing the navbar links to display too large on some setups
- Add extra spacing to screenlogger bullets (ubergine)

apps/routerconsole/java/src/net/i2p/router/web/LogsHelper.java

@@ -174,7 +174,8 @@ public class LogsHelper extends HelperBase {
                 else if (msg.contains(_t("ERROR")))
                     color = "#ff3300";
                 else if (msg.contains(_t("WARN")))
-                    color = "#ff00cc";
+                   // color = "#ff00cc"; poor legibility on light backgrounds
+                    color = "#bf00df";
                 else if (msg.contains(_t("INFO")))
                     color = "#000099";
                 else