Apply block style settings to dashboard layout builder

[Jeremy Hopkins]

Blocks added to dashboard with layout builder are not styled consistently with block settings in admin, specifically borders do not seem to be applied.

[Manoj Solanki]

Fix #737. Remove custom style definitions for front blocks.

→ <<cset 0f53f7b8720d>>

[Manoj Solanki]

Revert "Fix #737. Remove custom style definitions for front blocks.". Added back following review to keep border off these blocks.

This reverts commit 0f53f7b8720de226ae4b78f94125aea36a6bdd67.

→ <<cset f09cc4c5c236>>