Settings: Slimrecents background color && transparency [1/2]

Allow user to specify background color and transparency level
    for the slimrecents panel.

PS: now setting sticks through reboots and TRDS state
        changes. also, add reset to default color option.

PS: when resetting to default, use TRDS (png) resources
        instead of custom color

PS: properly set preference summary for default
        value ("TRDS default")

PS: remove LSN dependency

Change-Id: I8dd2543a3201b36f8c310de0da54f2f91ca474ef
Merge "Settings: Slimrecents background color && transparency [1/2]" into kk4.4
Settings it translation: transparent recent panel

Added strings for the new merged commit about the recent
panel background transparency

Change-Id: If1cce8a78b8ea516e59962918f32c0e21d1158fc
Settings FR translation: Recents panel background

Change-Id: I7d72d313ed6c99dbc3cb666c046aaa82d2456ae3
Settings: ES translations

Change-Id: I396bc7c142191a1be857f0cb5f5287fa3f582c0c
Settings: PL Translations

Change-Id: I391dfd0cb19025a2a40d8808327c4ae793bc0da2
Merge "Settings FR translation: Recents panel background" into kk4.4
Merge "Settings: ES translations" into kk4.4
Merge "Settings: PL Translations" into kk4.4
Merge pull request #1 from SlimRoms/kk4.4

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