services: Fix flashfocus startup

Flashfocus did not start up correctly since it was not required for the
`default.target` which is the only (?) valid target when systemd
operates in user-mode.

Instead of overwriting just part of the flashfocus service file, and
subsequently having it enabled for default.target and a non-existent
graphical.target user environment, we overwrite the whole file and set
it to `default.target`.

Additionally, the service should be restarted when it fails and slow
down on its restart attempts (I kept 5 seconds for this one, since it is
not as time critical as others -- no one cares if windows only flash
5 seconds after starting the machine.)

Added (wishful) After components to many service units, in case I figure
out one day how to make a useful target for the systemd user mode.

services/.config/systemd/user/default.target.wants/flashfocus.service

@@ -0,0 +1 @@
+../flashfocus.service

services/.config/systemd/user/dropdown-terminal.service

@@ -1,5 +1,6 @@
 [Unit]
 Description=Alacritty window hidden on i3 scratchpad
+After=display-manager.service
 
 [Service]
 Type=simple

services/.config/systemd/user/dropdown-todo.service

@@ -1,5 +1,6 @@
 [Unit]
 Description=Todo.md floating vim instance
+After=display-manager.service
 
 [Service]
 Type=simple

services/.config/systemd/user/flashfocus.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Perform windows animations on focus
+PartOf=graphical-session.target
+After=graphical-session.target
+
+[Service]
+ExecStart=/usr/bin/flashfocus
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=default.target

services/.config/systemd/user/flashfocus.service.d/override.conf

@@ -1,2 +0,0 @@
-[Service]
-RestartSec=5

services/.config/systemd/user/graphical-session.target.wants/flashfocus.service

@@ -1 +1 @@
-/usr/lib/systemd/user/flashfocus.service
+/home/marty/.config/systemd/user/flashfocus.service

services/.config/systemd/user/uni-notes-sync.service

@@ -1,5 +1,6 @@
 [Unit]
 Description=Automatically commit notes in university directory
+After=display-manager.service
 
 [Service]
 Type=simple