mail,mpv,qutebrowser,vifm: Fix small issues

Added videos directory to vifm quick marks (`v`).

Fixed (hopefully) qutebrowser statusbar hiding and showing.

Improved mail checking script password file handling by switching the
hard-coded path to one still somewhat hard-coded, but encapsulated in a
variable to make changing it later on easier. The script is a bit
slap-dash anyway, so when refactored should be refactored overall.

Added `gallery-dl` handling by mpv, whenever a link starting with
`gdl://` is passed in.

qutebrowser/.config/qutebrowser/config.py

@@ -71,14 +71,6 @@ c.tabs.title.format = "{index} {audio}{perc}{current_title}"
 c.tabs.position = "right"
 c.tabs.width = "15%"
 
-# give the browser nice theme colors
-config.source("colorscheme.py")
-
-# Status bar
-# should be visible to prevent 'jumping' bug,
-# see https://github.com/qutebrowser/qutebrowser/issues/2236
-c.statusbar.show = "always"
-
 c.colors.webpage.bg = "#555555"
 
 # FUNCTION
@@ -182,3 +174,6 @@ c.url.searchengines = {
     "hn": "https://hn.algolia.com/?q={}",
     "kb": "https://soeg.kb.dk/discovery/search?query=any,contains,{}&tab=Everything&search_scope=MyInst_and_CI&vid=45KBDK_KGL:KGL&offset=0&lang=en",
 }
+
+# give the browser nice theme colors
+config.source("colorscheme.py")