Log Message:
sakura: Update to 3.7.0

Changes:

 * Fixed bug with fore&back colors caused by changes in rev.5...
 * Merged with translations branch
 * Update translation template
 * Remove previously added set_style_css function.
 * Reorganize the big mess of code: order functions and callb...
 * Bug #1828091 fixed: sakura keeps blinking after BEL is rec...
 * Added helper function to set CSS style
 * Bug #1485360 fixed: bright colors broken
 * Bug #1833845 fixed: make 'configuration modified' dialog o...
 * Bug #1810332 fixed: unable to set 100% opacity
 * Bug #1839505 fixed: block cursor doesn't reverse text colo...
 * Changed default font size
 * Make tango palette default again
 * Bug #1792380: Solarized light doesn't work as expected. Us...
 * Removed unused variable in sakura_eof
 * Bug #1790317 fixed: Crash with vte 0.54