Optimize svg files notifications
**Some files visually differ**

files/usr/share/cinnamon/applets/notifications@cinnamon.org/empty-notif-symbolic.svg        Change size from 2182  to 203   bytes.(09.30% of original size)
                                                                                            *Lowered and made symmetric*
files/usr/share/cinnamon/applets/notifications@cinnamon.org/normal-notif-symbolic.svg       Change size from 1173  to 364   bytes.(31.03% of original size)
                                                                                            *Made ! symmetric*
files/usr/share/cinnamon/applets/notifications@cinnamon.org/critical-notif-symbolic.svg     Change size from 1296  to 403   bytes.(31.09% of original size)
                                                                                            *Many changes*
files/usr/share/cinnamon/applets/notifications@cinnamon.org/low-notif-symbolic.svg          Change size from 999   to 371   bytes.(37.13% of original size)
files/usr/share/cinnamon/applets/notifications@cinnamon.org/icon.svg                        Change size from 45538 to 27899 bytes.(61.26% of original size)
files/usr/share/cinnamon/applets/notifications@cinnamon.org/alt-critical-notif-symbolic.svg Change size from 1281  to 387   bytes.(30.21% of original size)
                                                                                            *Inherits all changes of critical-notif-symbolic.svg*

Total 56.46% of original size.
22842 bytes saved.